diff --git a/components/collator/README.md b/components/collator/README.md
index d9efb82635e..d2ef6a67f75 100644
--- a/components/collator/README.md
+++ b/components/collator/README.md
@@ -20,7 +20,7 @@ Create a directory `$PROJECTS/localicu`
 
 Create a directory `$PROJECTS/icu-build` and `cd` into it.
 
-Run `../icu/icu4c/source/runConfigureICU --enable-debug Linux --prefix /opt/Projects/localicu --enable-static`
+Run `../icu/icu4c/source/runConfigureICU --enable-debug Linux --prefix $PROJECTS/localicu --enable-static`
 
 Run `make`
 
diff --git a/components/collator/src/lib.rs b/components/collator/src/lib.rs
index ef495def545..c47eb454ff1 100644
--- a/components/collator/src/lib.rs
+++ b/components/collator/src/lib.rs
@@ -39,7 +39,7 @@
 //!
 //! Create a directory `$PROJECTS/icu-build` and `cd` into it.
 //!
-//! Run `../icu/icu4c/source/runConfigureICU --enable-debug Linux --prefix /opt/Projects/localicu --enable-static`
+//! Run `../icu/icu4c/source/runConfigureICU --enable-debug Linux --prefix $PROJECTS/localicu --enable-static`
 //!
 //! Run `make`
 //!
diff --git a/components/normalizer/src/lib.rs b/components/normalizer/src/lib.rs
index 1984f2a79cf..d6b5e862bc0 100644
--- a/components/normalizer/src/lib.rs
+++ b/components/normalizer/src/lib.rs
@@ -78,6 +78,7 @@ use alloc::string::String;
 use alloc::vec::Vec;
 use core::char::REPLACEMENT_CHARACTER;
 use icu_char16trie::char16trie::Char16Trie;
+use icu_char16trie::char16trie::Char16TrieIterator;
 use icu_char16trie::char16trie::TrieResult;
 use icu_codepointtrie::CodePointTrie;
 use icu_properties::maps::{CodePointMapData, CodePointMapDataBorrowed};
@@ -94,6 +95,7 @@ use provider::CompatibilityDecompositionTablesV1Marker;
 use provider::CompositionPassthroughV1;
 use provider::DecompositionSupplementV1;
 use provider::DecompositionTablesV1;
+use provider::NonRecursiveDecompositionSupplementV1Marker;
 #[cfg(any(test, feature = "experimental"))]
 use provider::Uts46CompositionPassthroughV1Marker;
 use smallvec::SmallVec;
@@ -245,6 +247,70 @@ fn in_inclusive_range(c: char, start: char, end: char) -> bool {
     u32::from(c).wrapping_sub(u32::from(start)) <= (u32::from(end) - u32::from(start))
 }
 
+/// Performs canonical composition (including Hangul) on a pair of
+/// characters or returns `None` if these characters don't compose.
+/// Composition exclusions are taken into account.
+#[inline]
+fn compose(iter: Char16TrieIterator, starter: char, second: char) -> Option<char> {
+    let v = u32::from(second).wrapping_sub(HANGUL_V_BASE);
+    if v >= HANGUL_JAMO_LIMIT - HANGUL_V_BASE {
+        return compose_non_hangul(iter, starter, second);
+    }
+    if v < HANGUL_V_COUNT {
+        let l = u32::from(starter).wrapping_sub(HANGUL_L_BASE);
+        if l < HANGUL_L_COUNT {
+            let lv = l * HANGUL_N_COUNT + v * HANGUL_T_COUNT;
+            // Safe, because the inputs are known to be in range.
+            return Some(unsafe { char::from_u32_unchecked(HANGUL_S_BASE + lv) });
+        }
+        return None;
+    }
+    if in_inclusive_range(second, '\u{11A8}', '\u{11C2}') {
+        let lv = u32::from(starter).wrapping_sub(HANGUL_S_BASE);
+        if lv < HANGUL_S_COUNT && lv % HANGUL_T_COUNT == 0 {
+            let lvt = lv + (u32::from(second) - HANGUL_T_BASE);
+            // Safe, because the inputs are known to be in range.
+            return Some(unsafe { char::from_u32_unchecked(HANGUL_S_BASE + lvt) });
+        }
+    }
+    None
+}
+
+/// Performs (non-Hangul) canonical composition on a pair of characters
+/// or returns `None` if these characters don't compose. Composition
+/// exclusions are taken into account.
+fn compose_non_hangul(mut iter: Char16TrieIterator, starter: char, second: char) -> Option<char> {
+    // To make the trie smaller, the pairs are stored second character first.
+    // Given how this method is used in ways where it's known that `second`
+    // is or isn't a starter. We could potentially split the trie into two
+    // tries depending on whether `second` is a starter.
+    match iter.next(second) {
+        TrieResult::NoMatch => None,
+        TrieResult::NoValue => match iter.next(starter) {
+            TrieResult::NoMatch => None,
+            TrieResult::FinalValue(i) => {
+                if let Some(c) = char::from_u32(i as u32) {
+                    Some(c)
+                } else {
+                    // GIGO case
+                    debug_assert!(false);
+                    None
+                }
+            }
+            TrieResult::NoValue | TrieResult::Intermediate(_) => {
+                // GIGO case
+                debug_assert!(false);
+                None
+            }
+        },
+        TrieResult::FinalValue(_) | TrieResult::Intermediate(_) => {
+            // GIGO case
+            debug_assert!(false);
+            None
+        }
+    }
+}
+
 /// Pack a `char` and a `CanonicalCombiningClass` in
 /// 32 bits (the former in the lower 24 bits and the
 /// latter in the high 8 bits). The latter is
@@ -819,66 +885,17 @@ where
     /// Performs canonical composition (including Hangul) on a pair of
     /// characters or returns `None` if these characters don't compose.
     /// Composition exclusions are taken into account.
-    #[inline]
+    #[inline(always)]
     pub fn compose(&self, starter: char, second: char) -> Option<char> {
-        let v = u32::from(second).wrapping_sub(HANGUL_V_BASE);
-        if v >= HANGUL_JAMO_LIMIT - HANGUL_V_BASE {
-            return self.compose_non_hangul(starter, second);
-        }
-        if v < HANGUL_V_COUNT {
-            let l = u32::from(starter).wrapping_sub(HANGUL_L_BASE);
-            if l < HANGUL_L_COUNT {
-                let lv = l * HANGUL_N_COUNT + v * HANGUL_T_COUNT;
-                // Safe, because the inputs are known to be in range.
-                return Some(unsafe { char::from_u32_unchecked(HANGUL_S_BASE + lv) });
-            }
-            return None;
-        }
-        if in_inclusive_range(second, '\u{11A8}', '\u{11C2}') {
-            let lv = u32::from(starter).wrapping_sub(HANGUL_S_BASE);
-            if lv < HANGUL_S_COUNT && lv % HANGUL_T_COUNT == 0 {
-                let lvt = lv + (u32::from(second) - HANGUL_T_BASE);
-                // Safe, because the inputs are known to be in range.
-                return Some(unsafe { char::from_u32_unchecked(HANGUL_S_BASE + lvt) });
-            }
-        }
-        None
+        compose(self.canonical_compositions.iter(), starter, second)
     }
 
     /// Performs (non-Hangul) canonical composition on a pair of characters
     /// or returns `None` if these characters don't compose. Composition
     /// exclusions are taken into account.
+    #[inline(always)]
     fn compose_non_hangul(&self, starter: char, second: char) -> Option<char> {
-        let mut iter = self.canonical_compositions.iter();
-        // To make the trie smaller, the pairs are stored second character first.
-        // Given how this method is used in ways where it's known that `second`
-        // is or isn't a starter. We could potentially split the trie into two
-        // tries depending on whether `second` is a starter.
-        match iter.next(second) {
-            TrieResult::NoMatch => None,
-            TrieResult::NoValue => match iter.next(starter) {
-                TrieResult::NoMatch => None,
-                TrieResult::FinalValue(i) => {
-                    if let Some(c) = char::from_u32(i as u32) {
-                        Some(c)
-                    } else {
-                        // GIGO case
-                        debug_assert!(false);
-                        None
-                    }
-                }
-                TrieResult::NoValue | TrieResult::Intermediate(_) => {
-                    // GIGO case
-                    debug_assert!(false);
-                    None
-                }
-            },
-            TrieResult::FinalValue(_) | TrieResult::Intermediate(_) => {
-                // GIGO case
-                debug_assert!(false);
-                None
-            }
-        }
+        compose_non_hangul(self.canonical_compositions.iter(), starter, second)
     }
 }
 
@@ -1573,5 +1590,272 @@ impl ComposingNormalizer {
     normalizer_methods!();
 }
 
+/// A struct for providing the raw canonical composition operation.
+///
+/// Callers should generally use `ComposingNormalizer` instead of this API.
+/// However, this API is provided for callers such as HarfBuzz that specifically
+/// want access to the raw canonical composition operation e.g. for use in a
+/// glyph-availability-guided custom normalizer.
+pub struct CanonicalComposition {
+    canonical_compositions: DataPayload<CanonicalCompositionsV1Marker>,
+}
+
+impl CanonicalComposition {
+    /// Performs canonical composition (including Hangul) on a pair of
+    /// characters or returns `None` if these characters don't compose.
+    /// Composition exclusions are taken into account.
+    ///
+    /// ```
+    /// let data_provider = icu_testdata::get_provider();
+    /// let comp = icu_normalizer::CanonicalComposition::try_new(&data_provider).unwrap();
+    ///
+    /// assert_eq!(comp.compose('a', 'b'), None); // Just two non-composing starters
+    /// assert_eq!(comp.compose('a', '\u{0308}'), Some('ä'));
+    /// assert_eq!(comp.compose('ẹ', '\u{0302}'), Some('ệ'));
+    /// assert_eq!(comp.compose('𝅗', '𝅥'), None); // Composition exclusion
+    /// assert_eq!(comp.compose('ে', 'া'), Some('ো')); // Second is starter
+    /// assert_eq!(comp.compose('ᄀ', 'ᅡ'), Some('가')); // Hangul LV
+    /// assert_eq!(comp.compose('가', 'ᆨ'), Some('각')); // Hangul LVT
+    /// ```
+    #[inline(always)]
+    pub fn compose(&self, starter: char, second: char) -> Option<char> {
+        compose(
+            self.canonical_compositions
+                .get()
+                .canonical_compositions
+                .iter(),
+            starter,
+            second,
+        )
+    }
+
+    /// Construct from data provider.
+    pub fn try_new<D>(data_provider: &D) -> Result<Self, NormalizerError>
+    where
+        D: ResourceProvider<CanonicalCompositionsV1Marker> + ?Sized,
+    {
+        let canonical_compositions: DataPayload<CanonicalCompositionsV1Marker> = data_provider
+            .load_resource(&DataRequest::default())?
+            .take_payload()?;
+        Ok(CanonicalComposition {
+            canonical_compositions,
+        })
+    }
+}
+
+/// The outcome of non-recursive canonical decomposition of a character.
+#[allow(clippy::exhaustive_enums)]
+#[derive(Debug, PartialEq, Eq)]
+pub enum Decomposed {
+    /// The character is its own canonical decomposition.
+    Default,
+    /// The character decomposes to a single different character.
+    Singleton(char),
+    /// The character decomposes to two characters.
+    Expansion(char, char),
+}
+
+/// A struct for providing the raw (non-recursive) canonical decomposition operation.
+///
+/// Callers should generally use `DecomposingNormalizer` instead of this API.
+/// However, this API is provided for callers such as HarfBuzz that specifically
+/// want access to non-recursive canonical decomposition e.g. for use in a
+/// glyph-availability-guided custom normalizer.
+pub struct CanonicalDecomposition {
+    decompositions: DataPayload<CanonicalDecompositionDataV1Marker>,
+    tables: DataPayload<CanonicalDecompositionTablesV1Marker>,
+    non_recursive: DataPayload<NonRecursiveDecompositionSupplementV1Marker>,
+}
+
+impl CanonicalDecomposition {
+    /// Performs non-recursive canonical decomposition (including for Hangul).
+    ///
+    /// ```
+    ///     use icu_normalizer::Decomposed;
+    ///     let data_provider = icu_testdata::get_provider();
+    ///     let decomp = icu_normalizer::CanonicalDecomposition::try_new(&data_provider).unwrap();
+    ///
+    ///     assert_eq!(decomp.decompose('e'), Decomposed::Default);
+    ///     assert_eq!(
+    ///         decomp.decompose('ệ'),
+    ///         Decomposed::Expansion('ẹ', '\u{0302}')
+    ///     );
+    ///     assert_eq!(decomp.decompose('각'), Decomposed::Expansion('가', 'ᆨ'));
+    ///     assert_eq!(decomp.decompose('\u{212B}'), Decomposed::Singleton('Å')); // ANGSTROM SIGN
+    ///     assert_eq!(decomp.decompose('\u{2126}'), Decomposed::Singleton('Ω')); // OHM SIGN
+    ///     assert_eq!(decomp.decompose('\u{1F71}'), Decomposed::Singleton('ά')); // oxia
+    /// ```
+    #[inline]
+    pub fn decompose(&self, c: char) -> Decomposed {
+        let lvt = u32::from(c).wrapping_sub(HANGUL_S_BASE);
+        if lvt >= HANGUL_S_COUNT {
+            return self.decompose_non_hangul(c);
+        }
+        let t = lvt % HANGUL_T_COUNT;
+        if t == 0 {
+            let l = lvt / HANGUL_N_COUNT;
+            let v = (lvt % HANGUL_N_COUNT) / HANGUL_T_COUNT;
+            // Safe because values known to be in range
+            return Decomposed::Expansion(
+                unsafe { char::from_u32_unchecked(HANGUL_L_BASE + l) },
+                unsafe { char::from_u32_unchecked(HANGUL_V_BASE + v) },
+            );
+        }
+        let lv = lvt - t;
+        // Safe because values known to be in range
+        Decomposed::Expansion(
+            unsafe { char::from_u32_unchecked(HANGUL_S_BASE + lv) },
+            unsafe { char::from_u32_unchecked(HANGUL_T_BASE + t) },
+        )
+    }
+
+    /// Performs non-recursive canonical decomposition except Hangul syllables
+    /// are reported as `Decomposed::Default`.
+    #[inline(always)]
+    fn decompose_non_hangul(&self, c: char) -> Decomposed {
+        let decomposition = self.decompositions.get().trie.get(u32::from(c));
+        if decomposition == 0 {
+            return Decomposed::Default;
+        }
+        // The loop is only broken out of as goto forward
+        #[allow(clippy::never_loop)]
+        loop {
+            let high = (decomposition >> 16) as u16;
+            let low = decomposition as u16;
+            if high != 0 && low != 0 {
+                // Decomposition into two BMP characters: starter and non-starter
+                if in_inclusive_range(c, '\u{1F71}', '\u{1FFB}') {
+                    // Look in the other trie due to oxia singleton
+                    // mappings to corresponding character with tonos.
+                    break;
+                } else if c == '\u{212B}' {
+                    // ANGSTROM SIGN
+                    return Decomposed::Singleton('\u{00C5}');
+                }
+                return Decomposed::Expansion(char_from_u16(high), char_from_u16(low));
+            }
+            if high != 0 {
+                // Decomposition into one BMP character
+                return Decomposed::Singleton(char_from_u16(high));
+            }
+            // Complex decomposition
+            // Format for 16-bit value:
+            // 15..13: length minus two for 16-bit case and length minus one for
+            //         the 32-bit case. Length 8 needs to fit in three bits in
+            //         the 16-bit case, and this way the value is future-proofed
+            //         up to 9 in the 16-bit case. Zero is unused and length one
+            //         in the 16-bit case goes directly into the trie.
+            //     12: 1 if all trailing characters are guaranteed non-starters,
+            //         0 if no guarantees about non-starterness.
+            //         Note: The bit choice is this way around to allow for
+            //         dynamically falling back to not having this but instead
+            //         having one more bit for length by merely choosing
+            //         different masks.
+            //  11..0: Start offset in storage. The offset is to the logical
+            //         sequence of scalars16, scalars32, supplementary_scalars16,
+            //         supplementary_scalars32.
+            let offset = usize::from(low & 0xFFF);
+            let tables = self.tables.get();
+            if offset < tables.scalars16.len() {
+                if usize::from(low >> 13) != 0 {
+                    // i.e. logical len isn't 2
+                    break;
+                }
+                if let Some(first) = tables.scalars16.get(offset) {
+                    if let Some(second) = tables.scalars16.get(offset + 1) {
+                        // Two BMP starters
+                        return Decomposed::Expansion(char_from_u16(first), char_from_u16(second));
+                    }
+                }
+                // GIGO case
+                debug_assert!(false);
+                return Decomposed::Default;
+            }
+            let len = usize::from(low >> 13) + 1;
+            if len > 2 {
+                break;
+            }
+            let offset24 = offset - tables.scalars16.len();
+            if let Some(first) = tables.scalars24.get(offset24) {
+                let first_c = char_from_u24(first);
+                if len == 1 {
+                    return Decomposed::Singleton(first_c);
+                }
+                if let Some(second) = tables.scalars24.get(offset24 + 1) {
+                    let second_c = char_from_u24(second);
+                    return Decomposed::Expansion(first_c, second_c);
+                }
+            }
+            // GIGO case
+            debug_assert!(false);
+            return Decomposed::Default;
+        }
+        let non_recursive = self.non_recursive.get();
+        let non_recursive_decomposition = non_recursive.trie.get(u32::from(c));
+        if non_recursive_decomposition == 0 {
+            // GIGO case
+            debug_assert!(false);
+            return Decomposed::Default;
+        }
+        let high = (non_recursive_decomposition >> 16) as u16;
+        let low = non_recursive_decomposition as u16;
+        if high != 0 && low != 0 {
+            // Decomposition into two BMP characters
+            return Decomposed::Expansion(char_from_u16(high), char_from_u16(low));
+        }
+        if high != 0 {
+            // Decomposition into one BMP character
+            return Decomposed::Singleton(char_from_u16(high));
+        }
+        // Decomposition into two non-BMP characters
+        // Low is offset into a table plus one to keep it non-zero.
+        let offset = usize::from(low - 1);
+        if let Some(first) = non_recursive.scalars24.get(offset) {
+            if let Some(second) = non_recursive.scalars24.get(offset + 1) {
+                return Decomposed::Expansion(char_from_u24(first), char_from_u24(second));
+            }
+        }
+        // GIGO case
+        debug_assert!(false);
+        Decomposed::Default
+    }
+
+    /// Construct from data provider.
+    pub fn try_new<D>(data_provider: &D) -> Result<Self, NormalizerError>
+    where
+        D: ResourceProvider<CanonicalDecompositionDataV1Marker>
+            + ResourceProvider<CanonicalDecompositionTablesV1Marker>
+            + ResourceProvider<NonRecursiveDecompositionSupplementV1Marker>
+            + ?Sized,
+    {
+        let decompositions: DataPayload<CanonicalDecompositionDataV1Marker> = data_provider
+            .load_resource(&DataRequest::default())?
+            .take_payload()?;
+        let tables: DataPayload<CanonicalDecompositionTablesV1Marker> = data_provider
+            .load_resource(&DataRequest::default())?
+            .take_payload()?;
+
+        if tables.get().scalars16.len() + tables.get().scalars24.len() > 0xFFF {
+            // The data is from a future where there exists a normalization flavor whose
+            // complex decompositions take more than 0xFFF but fewer than 0x1FFF code points
+            // of space. If a good use case from such a decomposition flavor arises, we can
+            // dynamically change the bit masks so that the length mask becomes 0x1FFF instead
+            // of 0xFFF and the all-non-starters mask becomes 0 instead of 0x1000. However,
+            // since for now the masks are hard-coded, error out.
+            return Err(NormalizerError::FutureExtension);
+        }
+
+        let non_recursive: DataPayload<NonRecursiveDecompositionSupplementV1Marker> = data_provider
+            .load_resource(&DataRequest::default())?
+            .take_payload()?;
+
+        Ok(CanonicalDecomposition {
+            decompositions,
+            tables,
+            non_recursive,
+        })
+    }
+}
+
 #[cfg(all(test, feature = "serde"))]
 mod tests;
diff --git a/components/normalizer/src/provider.rs b/components/normalizer/src/provider.rs
index 0fe882ec25f..e5a544300a6 100644
--- a/components/normalizer/src/provider.rs
+++ b/components/normalizer/src/provider.rs
@@ -124,3 +124,19 @@ pub struct CompositionPassthroughV1<'data> {
     #[cfg_attr(feature = "serde", serde(borrow))]
     pub potential_passthrough_and_not_backward_combining: UnicodeSet<'data>,
 }
+
+/// Non-recursive canonical decompositions that differ from
+/// `DecompositionDataV1`.
+#[icu_provider::data_struct(NonRecursiveDecompositionSupplementV1Marker = "normalizer/decomp@1")]
+#[derive(Debug, PartialEq, Clone)]
+#[cfg_attr(feature = "datagen", derive(serde::Serialize, databake::Bake), databake(path = icu_normalizer::provider))]
+#[cfg_attr(feature = "serde", derive(serde::Deserialize))]
+pub struct NonRecursiveDecompositionSupplementV1<'data> {
+    /// Trie for the supplementary non-recursive decompositions
+    #[cfg_attr(feature = "serde", serde(borrow))]
+    pub trie: CodePointTrie<'data, u32>,
+    /// Decompositions with at least one character outside
+    /// the BMP
+    #[cfg_attr(feature = "serde", serde(borrow))]
+    pub scalars24: ZeroVec<'data, U24>,
+}
diff --git a/components/normalizer/src/tests.rs b/components/normalizer/src/tests.rs
index 189ccb427f5..28a8108d2d2 100644
--- a/components/normalizer/src/tests.rs
+++ b/components/normalizer/src/tests.rs
@@ -2,7 +2,10 @@
 // called LICENSE at the top level of the ICU4X source tree
 // (online at: https://github.com/unicode-org/icu4x/blob/main/LICENSE ).
 
+use crate::CanonicalComposition;
+use crate::CanonicalDecomposition;
 use crate::ComposingNormalizer;
+use crate::Decomposed;
 use crate::DecomposingNormalizer;
 
 #[test]
@@ -340,3 +343,67 @@ fn test_hangul() {
         assert!(norm_iter.eq("A\u{AC1B}".chars()));
     }
 }
+
+#[test]
+fn test_canonical_composition() {
+    let data_provider = icu_testdata::get_provider();
+    let comp = CanonicalComposition::try_new(&data_provider).unwrap();
+
+    assert_eq!(comp.compose('a', 'b'), None); // Just two starters
+
+    assert_eq!(comp.compose('a', '\u{0308}'), Some('ä'));
+    assert_eq!(comp.compose('A', '\u{0308}'), Some('Ä'));
+    assert_eq!(comp.compose('ẹ', '\u{0302}'), Some('ệ'));
+    assert_eq!(comp.compose('Ẹ', '\u{0302}'), Some('Ệ'));
+    assert_eq!(comp.compose('\u{1D157}', '\u{1D165}'), None); // Composition exclusion
+
+    assert_eq!(comp.compose('ে', 'া'), Some('ো')); // Second is starter; BMP
+    assert_eq!(comp.compose('𑄱', '𑄧'), Some('𑄮')); // Second is starter; non-BMP
+
+    assert_eq!(comp.compose('ᄀ', 'ᅡ'), Some('가')); // Hangul LV
+    assert_eq!(comp.compose('가', 'ᆨ'), Some('각')); // Hangul LVT
+}
+
+#[test]
+fn test_canonical_decomposition() {
+    let data_provider = icu_testdata::get_provider();
+    let decomp = CanonicalDecomposition::try_new(&data_provider).unwrap();
+
+    assert_eq!(
+        decomp.decompose('ä'),
+        Decomposed::Expansion('a', '\u{0308}')
+    );
+    assert_eq!(
+        decomp.decompose('Ä'),
+        Decomposed::Expansion('A', '\u{0308}')
+    );
+    assert_eq!(
+        decomp.decompose('ệ'),
+        Decomposed::Expansion('ẹ', '\u{0302}')
+    );
+    assert_eq!(
+        decomp.decompose('Ệ'),
+        Decomposed::Expansion('Ẹ', '\u{0302}')
+    );
+    assert_eq!(
+        decomp.decompose('\u{1D15E}'),
+        Decomposed::Expansion('\u{1D157}', '\u{1D165}')
+    );
+    assert_eq!(decomp.decompose('ো'), Decomposed::Expansion('ে', 'া'));
+    assert_eq!(decomp.decompose('𑄮'), Decomposed::Expansion('𑄱', '𑄧'));
+    assert_eq!(decomp.decompose('가'), Decomposed::Expansion('ᄀ', 'ᅡ'));
+    assert_eq!(decomp.decompose('각'), Decomposed::Expansion('가', 'ᆨ'));
+
+    assert_eq!(decomp.decompose('\u{212B}'), Decomposed::Singleton('Å')); // ANGSTROM SIGN
+    assert_eq!(decomp.decompose('\u{2126}'), Decomposed::Singleton('Ω')); // OHM SIGN
+
+    assert_eq!(decomp.decompose('\u{1F71}'), Decomposed::Singleton('ά')); // oxia
+    assert_eq!(
+        decomp.decompose('\u{1F72}'),
+        Decomposed::Expansion('ε', '\u{0300}')
+    ); // not oxia but in the oxia range
+    assert_eq!(
+        decomp.decompose('ά'),
+        Decomposed::Expansion('α', '\u{0301}')
+    ); // tonos
+}
diff --git a/provider/datagen/src/registry.rs b/provider/datagen/src/registry.rs
index b496d79cf63..426c23b99ee 100644
--- a/provider/datagen/src/registry.rs
+++ b/provider/datagen/src/registry.rs
@@ -44,6 +44,8 @@ pub fn all_keys() -> Vec<ResourceKey> {
         icu_normalizer::provider::CompatibilityCompositionPassthroughV1Marker::KEY,
         #[cfg(feature = "experimental")]
         icu_normalizer::provider::Uts46CompositionPassthroughV1Marker::KEY,
+        #[cfg(feature = "experimental")]
+        icu_normalizer::provider::NonRecursiveDecompositionSupplementV1Marker::KEY,
     ];
     v.extend(icu_properties::provider::ALL_KEYS);
     #[cfg(feature = "experimental")]
@@ -190,6 +192,7 @@ macro_rules! create_datagen_provider {
                 $crate::transform::icuexport::normalizer::CanonicalCompositionPassthroughProvider,
                 $crate::transform::icuexport::normalizer::CompatibilityCompositionPassthroughProvider,
                 $crate::transform::icuexport::normalizer::Uts46CompositionPassthroughProvider,
+                $crate::transform::icuexport::normalizer::NonRecursiveDecompositionSupplementProvider,
                 $crate::transform::icuexport::ucase::CaseMappingDataProvider,
                 $crate::transform::icuexport::uprops::EnumeratedPropertyCodePointTrieProvider,
                 $crate::transform::icuexport::uprops::ScriptWithExtensionsPropertyProvider,
diff --git a/provider/datagen/src/transform/icuexport/normalizer/mod.rs b/provider/datagen/src/transform/icuexport/normalizer/mod.rs
index 2369962a9bc..26a507b98b5 100644
--- a/provider/datagen/src/transform/icuexport/normalizer/mod.rs
+++ b/provider/datagen/src/transform/icuexport/normalizer/mod.rs
@@ -191,6 +191,39 @@ macro_rules! normalization_canonical_compositions_provider {
     };
 }
 
+macro_rules! normalization_non_recursive_decomposition_supplement_provider {
+    ($marker:ident, $provider:ident, $file_name:literal) => {
+        normalization_provider!(
+            $marker,
+            $provider,
+            NonRecursiveDecompositionSupplement,
+            $file_name,
+            {
+                let trie = CodePointTrie::<u32>::try_from(&toml_data.trie)
+                    .map_err(|e| DataError::custom("trie conversion").with_display_context(&e))?;
+                let mut scalars24: Vec<U24> = Vec::new();
+                for &u in toml_data.scalars32.iter() {
+                    scalars24.push(
+                        u.try_into()
+                            .map_err(|_| DataError::custom("scalars24 conversion"))?,
+                    );
+                }
+
+                Ok(DataResponse {
+                    metadata: DataResponseMetadata::default(),
+                    payload: Some(DataPayload::from_owned(
+                        NonRecursiveDecompositionSupplementV1 {
+                            trie,
+                            scalars24: ZeroVec::alloc_from_slice(&scalars24),
+                        },
+                    )),
+                })
+            },
+            toml_data // simply matches the identifier in the above block
+        );
+    };
+}
+
 normalization_data_provider!(
     CanonicalDecompositionDataV1Marker,
     CanonicalDecompositionDataProvider,
@@ -257,3 +290,9 @@ normalization_canonical_compositions_provider!(
     CanonicalCompositionsProvider,
     "compositions"
 );
+
+normalization_non_recursive_decomposition_supplement_provider!(
+    NonRecursiveDecompositionSupplementV1Marker,
+    NonRecursiveDecompositionSupplementProvider,
+    "decompositionex"
+);
diff --git a/provider/datagen/src/transform/icuexport/normalizer/normalizer_serde.rs b/provider/datagen/src/transform/icuexport/normalizer/normalizer_serde.rs
index 32cc91cb100..8516b8303e5 100644
--- a/provider/datagen/src/transform/icuexport/normalizer/normalizer_serde.rs
+++ b/provider/datagen/src/transform/icuexport/normalizer/normalizer_serde.rs
@@ -31,3 +31,9 @@ pub struct CompositionPassthrough {
 pub struct CanonicalCompositions {
     pub compositions: Vec<u16>,
 }
+
+#[derive(serde::Deserialize)]
+pub struct NonRecursiveDecompositionSupplement {
+    pub trie: CodePointTrieToml,
+    pub scalars32: Vec<u32>,
+}
diff --git a/provider/testdata/data/baked/any.rs b/provider/testdata/data/baked/any.rs
index d5df1f6369f..afc5e632dac 100644
--- a/provider/testdata/data/baked/any.rs
+++ b/provider/testdata/data/baked/any.rs
@@ -49,6 +49,8 @@ impl AnyProvider for BakedDataProvider {
             ::icu_normalizer::provider::CompatibilityDecompositionSupplementV1Marker::KEY.get_hash();
         const COMPATIBILITYDECOMPOSITIONTABLESV1MARKER: ::icu_provider::ResourceKeyHash =
             ::icu_normalizer::provider::CompatibilityDecompositionTablesV1Marker::KEY.get_hash();
+        const NONRECURSIVEDECOMPOSITIONSUPPLEMENTV1MARKER: ::icu_provider::ResourceKeyHash =
+            ::icu_normalizer::provider::NonRecursiveDecompositionSupplementV1Marker::KEY.get_hash();
         const UTS46COMPOSITIONPASSTHROUGHV1MARKER: ::icu_provider::ResourceKeyHash =
             ::icu_normalizer::provider::Uts46CompositionPassthroughV1Marker::KEY.get_hash();
         const UTS46DECOMPOSITIONSUPPLEMENTV1MARKER: ::icu_provider::ResourceKeyHash =
@@ -252,6 +254,9 @@ impl AnyProvider for BakedDataProvider {
                 COMPATIBILITYDECOMPOSITIONTABLESV1MARKER => AnyPayload::from_static_ref::<
                     <::icu_normalizer::provider::CompatibilityDecompositionTablesV1Marker as DataMarker>::Yokeable,
                 >(litemap_slice_get(normalizer::nfkdex_v1::DATA, key, req)?),
+                NONRECURSIVEDECOMPOSITIONSUPPLEMENTV1MARKER => AnyPayload::from_static_ref::<
+                    <::icu_normalizer::provider::NonRecursiveDecompositionSupplementV1Marker as DataMarker>::Yokeable,
+                >(litemap_slice_get(normalizer::decomp_v1::DATA, key, req)?),
                 UTS46COMPOSITIONPASSTHROUGHV1MARKER => AnyPayload::from_static_ref::<
                     <::icu_normalizer::provider::Uts46CompositionPassthroughV1Marker as DataMarker>::Yokeable,
                 >(litemap_slice_get(normalizer::uts46_v1::DATA, key, req)?),
diff --git a/provider/testdata/data/baked/mod.rs b/provider/testdata/data/baked/mod.rs
index 68bf63157c7..e8aa026f762 100644
--- a/provider/testdata/data/baked/mod.rs
+++ b/provider/testdata/data/baked/mod.rs
@@ -497,6 +497,19 @@ impl ResourceProvider<::icu_normalizer::provider::CompatibilityDecompositionTabl
         Ok (DataResponse { metadata : Default :: default () , payload : Some (DataPayload :: from_owned (zerofrom :: ZeroFrom :: zero_from (litemap_slice_get (normalizer :: nfkdex_v1 :: DATA , < :: icu_normalizer :: provider :: CompatibilityDecompositionTablesV1Marker as ResourceMarker > :: KEY , req) ? ,))) , })
     }
 }
+impl ResourceProvider<::icu_normalizer::provider::NonRecursiveDecompositionSupplementV1Marker>
+    for BakedDataProvider
+{
+    fn load_resource(
+        &self,
+        req: &DataRequest,
+    ) -> Result<
+        DataResponse<::icu_normalizer::provider::NonRecursiveDecompositionSupplementV1Marker>,
+        DataError,
+    > {
+        Ok (DataResponse { metadata : Default :: default () , payload : Some (DataPayload :: from_owned (zerofrom :: ZeroFrom :: zero_from (litemap_slice_get (normalizer :: decomp_v1 :: DATA , < :: icu_normalizer :: provider :: NonRecursiveDecompositionSupplementV1Marker as ResourceMarker > :: KEY , req) ? ,))) , })
+    }
+}
 impl ResourceProvider<::icu_normalizer::provider::Uts46CompositionPassthroughV1Marker>
     for BakedDataProvider
 {
diff --git a/provider/testdata/data/baked/normalizer/decomp_v1.rs b/provider/testdata/data/baked/normalizer/decomp_v1.rs
new file mode 100644
index 00000000000..186b7d94cd0
--- /dev/null
+++ b/provider/testdata/data/baked/normalizer/decomp_v1.rs
@@ -0,0 +1,296 @@
+// @generated
+type DataStruct = & 'static < :: icu_normalizer :: provider :: NonRecursiveDecompositionSupplementV1Marker as :: icu_provider :: DataMarker > :: Yokeable ;
+pub static DATA: &[(&str, DataStruct)] = &[("und", UND)];
+static UND: DataStruct = &::icu_normalizer::provider::NonRecursiveDecompositionSupplementV1 {
+    trie: ::icu_codepointtrie::CodePointTrie::from_parts(
+        ::icu_codepointtrie::CodePointTrieHeader {
+            high_start: 119296u32,
+            shifted12_high_start: 30u16,
+            index3_null_offset: 15u16,
+            data_null_offset: 0u32,
+            null_value: 0u32,
+            trie_type: ::icu_codepointtrie::TrieType::Small,
+        },
+        unsafe {
+            ::zerovec::ZeroVec::from_bytes_unchecked(&[
+                0u8, 0u8, 64u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 107u8, 0u8,
+                167u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 217u8, 0u8, 0u8, 0u8,
+                0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
+                0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
+                0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
+                0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
+                0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 14u8, 1u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 49u8, 1u8,
+                0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
+                11u8, 1u8, 27u8, 1u8, 27u8, 1u8, 30u8, 1u8, 27u8, 1u8, 27u8, 1u8, 27u8, 1u8, 60u8,
+                1u8, 0u8, 0u8, 16u8, 0u8, 32u8, 0u8, 48u8, 0u8, 64u8, 0u8, 80u8, 0u8, 96u8, 0u8,
+                112u8, 0u8, 0u8, 0u8, 16u8, 0u8, 32u8, 0u8, 48u8, 0u8, 0u8, 0u8, 16u8, 0u8, 32u8,
+                0u8, 48u8, 0u8, 0u8, 0u8, 16u8, 0u8, 32u8, 0u8, 48u8, 0u8, 0u8, 0u8, 16u8, 0u8,
+                32u8, 0u8, 48u8, 0u8, 0u8, 0u8, 16u8, 0u8, 32u8, 0u8, 48u8, 0u8, 107u8, 0u8, 123u8,
+                0u8, 139u8, 0u8, 155u8, 0u8, 167u8, 0u8, 183u8, 0u8, 199u8, 0u8, 215u8, 0u8, 0u8,
+                0u8, 16u8, 0u8, 32u8, 0u8, 48u8, 0u8, 0u8, 0u8, 16u8, 0u8, 32u8, 0u8, 48u8, 0u8,
+                0u8, 0u8, 16u8, 0u8, 32u8, 0u8, 48u8, 0u8, 0u8, 0u8, 16u8, 0u8, 32u8, 0u8, 48u8,
+                0u8, 0u8, 0u8, 16u8, 0u8, 32u8, 0u8, 48u8, 0u8, 217u8, 0u8, 233u8, 0u8, 249u8, 0u8,
+                9u8, 1u8, 0u8, 0u8, 16u8, 0u8, 32u8, 0u8, 48u8, 0u8, 0u8, 0u8, 16u8, 0u8, 32u8,
+                0u8, 48u8, 0u8, 0u8, 0u8, 16u8, 0u8, 32u8, 0u8, 48u8, 0u8, 0u8, 0u8, 16u8, 0u8,
+                32u8, 0u8, 48u8, 0u8, 0u8, 0u8, 16u8, 0u8, 32u8, 0u8, 48u8, 0u8, 0u8, 0u8, 16u8,
+                0u8, 32u8, 0u8, 48u8, 0u8, 0u8, 0u8, 16u8, 0u8, 32u8, 0u8, 48u8, 0u8, 0u8, 0u8,
+                16u8, 0u8, 32u8, 0u8, 48u8, 0u8, 14u8, 1u8, 30u8, 1u8, 46u8, 1u8, 62u8, 1u8, 0u8,
+                0u8, 16u8, 0u8, 32u8, 0u8, 48u8, 0u8, 0u8, 0u8, 16u8, 0u8, 32u8, 0u8, 48u8, 0u8,
+                0u8, 0u8, 16u8, 0u8, 32u8, 0u8, 48u8, 0u8, 49u8, 1u8, 65u8, 1u8, 81u8, 1u8, 97u8,
+                1u8, 105u8, 1u8, 117u8, 1u8, 131u8, 1u8, 147u8, 1u8, 157u8, 1u8, 173u8, 1u8, 187u8,
+                1u8, 197u8, 1u8, 0u8, 0u8, 0u8, 0u8, 209u8, 1u8, 225u8, 1u8, 241u8, 1u8, 1u8, 2u8,
+                17u8, 2u8, 33u8, 2u8, 47u8, 2u8, 63u8, 2u8, 77u8, 2u8, 93u8, 2u8, 109u8, 2u8,
+                123u8, 2u8, 139u8, 2u8, 155u8, 2u8, 171u8, 2u8, 187u8, 2u8, 203u8, 2u8, 219u8, 2u8,
+                234u8, 2u8, 250u8, 2u8, 10u8, 3u8, 26u8, 3u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
+                0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
+                0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 38u8, 3u8, 0u8,
+                0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
+                0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
+                0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 54u8, 3u8, 0u8, 0u8, 0u8,
+                0u8, 0u8, 0u8, 0u8, 0u8, 59u8, 3u8, 75u8, 3u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 72u8,
+                0u8, 104u8, 0u8, 132u8, 0u8, 132u8, 0u8, 132u8, 0u8, 132u8, 0u8, 152u8, 0u8, 132u8,
+                0u8, 15u8, 0u8, 15u8, 0u8, 15u8, 0u8, 15u8, 0u8, 15u8, 0u8, 15u8, 0u8, 15u8, 0u8,
+                184u8, 0u8, 15u8, 0u8, 15u8, 0u8, 15u8, 0u8, 15u8, 0u8, 15u8, 0u8, 15u8, 0u8, 15u8,
+                0u8, 15u8, 0u8, 15u8, 0u8, 15u8, 0u8, 15u8, 0u8, 15u8, 0u8, 15u8, 0u8, 15u8, 0u8,
+                15u8, 0u8, 15u8, 0u8, 15u8, 0u8, 15u8, 0u8, 15u8, 0u8, 15u8, 0u8, 15u8, 0u8, 15u8,
+                0u8, 15u8, 0u8, 15u8, 0u8, 15u8, 0u8, 15u8, 0u8, 15u8, 0u8, 15u8, 0u8, 15u8, 0u8,
+                15u8, 0u8, 15u8, 0u8, 15u8, 0u8, 216u8, 0u8, 15u8, 0u8, 15u8, 0u8, 15u8, 0u8, 15u8,
+                0u8, 15u8, 0u8, 15u8, 0u8, 15u8, 0u8, 15u8, 0u8, 235u8, 0u8, 238u8, 255u8,
+            ])
+        },
+        unsafe {
+            ::zerovec::ZeroVec::from_bytes_unchecked(&[
+                0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
+                0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
+                0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
+                0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
+                0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
+                0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
+                0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
+                0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
+                0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
+                0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
+                0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
+                0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
+                0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
+                0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
+                0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
+                0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
+                0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
+                0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
+                0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
+                0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
+                0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
+                0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
+                0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
+                0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
+                0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
+                0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
+                0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
+                0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
+                0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
+                0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
+                0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
+                0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
+                4u8, 3u8, 220u8, 0u8, 4u8, 3u8, 252u8, 0u8, 1u8, 3u8, 220u8, 0u8, 1u8, 3u8, 252u8,
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+                31u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 3u8, 40u8, 31u8, 0u8, 3u8, 41u8,
+                31u8, 1u8, 3u8, 40u8, 31u8, 1u8, 3u8, 41u8, 31u8, 66u8, 3u8, 40u8, 31u8, 66u8, 3u8,
+                41u8, 31u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 3u8, 48u8, 31u8, 0u8, 3u8,
+                49u8, 31u8, 1u8, 3u8, 48u8, 31u8, 1u8, 3u8, 49u8, 31u8, 66u8, 3u8, 48u8, 31u8,
+                66u8, 3u8, 49u8, 31u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 3u8, 56u8,
+                31u8, 0u8, 3u8, 57u8, 31u8, 1u8, 3u8, 56u8, 31u8, 1u8, 3u8, 57u8, 31u8, 66u8, 3u8,
+                56u8, 31u8, 66u8, 3u8, 57u8, 31u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
+                3u8, 64u8, 31u8, 0u8, 3u8, 65u8, 31u8, 1u8, 3u8, 64u8, 31u8, 1u8, 3u8, 65u8, 31u8,
+                0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
+                0u8, 3u8, 72u8, 31u8, 0u8, 3u8, 73u8, 31u8, 1u8, 3u8, 72u8, 31u8, 1u8, 3u8, 73u8,
+                31u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 3u8, 80u8, 31u8, 0u8, 3u8, 81u8,
+                31u8, 1u8, 3u8, 80u8, 31u8, 1u8, 3u8, 81u8, 31u8, 66u8, 3u8, 80u8, 31u8, 66u8, 3u8,
+                81u8, 31u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 3u8,
+                89u8, 31u8, 0u8, 0u8, 0u8, 0u8, 1u8, 3u8, 89u8, 31u8, 0u8, 0u8, 0u8, 0u8, 66u8,
+                3u8, 89u8, 31u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 3u8, 96u8, 31u8, 0u8,
+                3u8, 97u8, 31u8, 1u8, 3u8, 96u8, 31u8, 1u8, 3u8, 97u8, 31u8, 66u8, 3u8, 96u8, 31u8,
+                66u8, 3u8, 97u8, 31u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 3u8, 104u8,
+                31u8, 0u8, 3u8, 105u8, 31u8, 1u8, 3u8, 104u8, 31u8, 1u8, 3u8, 105u8, 31u8, 66u8,
+                3u8, 104u8, 31u8, 66u8, 3u8, 105u8, 31u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 172u8, 3u8,
+                0u8, 3u8, 181u8, 3u8, 0u8, 0u8, 173u8, 3u8, 0u8, 3u8, 183u8, 3u8, 0u8, 0u8, 174u8,
+                3u8, 0u8, 3u8, 185u8, 3u8, 0u8, 0u8, 175u8, 3u8, 0u8, 3u8, 191u8, 3u8, 0u8, 0u8,
+                204u8, 3u8, 0u8, 3u8, 197u8, 3u8, 0u8, 0u8, 205u8, 3u8, 0u8, 3u8, 201u8, 3u8, 0u8,
+                0u8, 206u8, 3u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 69u8, 3u8, 0u8, 31u8,
+                69u8, 3u8, 1u8, 31u8, 69u8, 3u8, 2u8, 31u8, 69u8, 3u8, 3u8, 31u8, 69u8, 3u8, 4u8,
+                31u8, 69u8, 3u8, 5u8, 31u8, 69u8, 3u8, 6u8, 31u8, 69u8, 3u8, 7u8, 31u8, 69u8, 3u8,
+                8u8, 31u8, 69u8, 3u8, 9u8, 31u8, 69u8, 3u8, 10u8, 31u8, 69u8, 3u8, 11u8, 31u8,
+                69u8, 3u8, 12u8, 31u8, 69u8, 3u8, 13u8, 31u8, 69u8, 3u8, 14u8, 31u8, 69u8, 3u8,
+                15u8, 31u8, 69u8, 3u8, 32u8, 31u8, 69u8, 3u8, 33u8, 31u8, 69u8, 3u8, 34u8, 31u8,
+                69u8, 3u8, 35u8, 31u8, 69u8, 3u8, 36u8, 31u8, 69u8, 3u8, 37u8, 31u8, 69u8, 3u8,
+                38u8, 31u8, 69u8, 3u8, 39u8, 31u8, 69u8, 3u8, 40u8, 31u8, 69u8, 3u8, 41u8, 31u8,
+                69u8, 3u8, 42u8, 31u8, 69u8, 3u8, 43u8, 31u8, 69u8, 3u8, 44u8, 31u8, 69u8, 3u8,
+                45u8, 31u8, 69u8, 3u8, 46u8, 31u8, 69u8, 3u8, 47u8, 31u8, 69u8, 3u8, 96u8, 31u8,
+                69u8, 3u8, 97u8, 31u8, 69u8, 3u8, 98u8, 31u8, 69u8, 3u8, 99u8, 31u8, 69u8, 3u8,
+                100u8, 31u8, 69u8, 3u8, 101u8, 31u8, 69u8, 3u8, 102u8, 31u8, 69u8, 3u8, 103u8,
+                31u8, 69u8, 3u8, 104u8, 31u8, 69u8, 3u8, 105u8, 31u8, 69u8, 3u8, 106u8, 31u8, 69u8,
+                3u8, 107u8, 31u8, 69u8, 3u8, 108u8, 31u8, 69u8, 3u8, 109u8, 31u8, 69u8, 3u8, 110u8,
+                31u8, 69u8, 3u8, 111u8, 31u8, 6u8, 3u8, 177u8, 3u8, 4u8, 3u8, 177u8, 3u8, 69u8,
+                3u8, 112u8, 31u8, 69u8, 3u8, 177u8, 3u8, 69u8, 3u8, 172u8, 3u8, 0u8, 0u8, 0u8, 0u8,
+                66u8, 3u8, 177u8, 3u8, 69u8, 3u8, 182u8, 31u8, 6u8, 3u8, 145u8, 3u8, 4u8, 3u8,
+                145u8, 3u8, 0u8, 3u8, 145u8, 3u8, 0u8, 0u8, 134u8, 3u8, 69u8, 3u8, 145u8, 3u8, 0u8,
+                0u8, 0u8, 0u8, 0u8, 0u8, 185u8, 3u8, 0u8, 0u8, 0u8, 0u8, 66u8, 3u8, 168u8, 0u8,
+                69u8, 3u8, 116u8, 31u8, 69u8, 3u8, 183u8, 3u8, 69u8, 3u8, 174u8, 3u8, 0u8, 0u8,
+                0u8, 0u8, 66u8, 3u8, 183u8, 3u8, 69u8, 3u8, 198u8, 31u8, 0u8, 3u8, 149u8, 3u8, 0u8,
+                0u8, 136u8, 3u8, 0u8, 3u8, 151u8, 3u8, 0u8, 0u8, 137u8, 3u8, 69u8, 3u8, 151u8, 3u8,
+                0u8, 3u8, 191u8, 31u8, 1u8, 3u8, 191u8, 31u8, 66u8, 3u8, 191u8, 31u8, 6u8, 3u8,
+                185u8, 3u8, 4u8, 3u8, 185u8, 3u8, 0u8, 3u8, 202u8, 3u8, 0u8, 0u8, 144u8, 3u8, 0u8,
+                0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 66u8, 3u8, 185u8, 3u8, 66u8, 3u8, 202u8, 3u8,
+                6u8, 3u8, 153u8, 3u8, 4u8, 3u8, 153u8, 3u8, 0u8, 3u8, 153u8, 3u8, 0u8, 0u8, 138u8,
+                3u8, 0u8, 0u8, 0u8, 0u8, 0u8, 3u8, 254u8, 31u8, 1u8, 3u8, 254u8, 31u8, 66u8, 3u8,
+                254u8, 31u8, 6u8, 3u8, 197u8, 3u8, 4u8, 3u8, 197u8, 3u8, 0u8, 3u8, 203u8, 3u8, 0u8,
+                0u8, 176u8, 3u8, 19u8, 3u8, 193u8, 3u8, 20u8, 3u8, 193u8, 3u8, 66u8, 3u8, 197u8,
+                3u8, 66u8, 3u8, 203u8, 3u8, 6u8, 3u8, 165u8, 3u8, 4u8, 3u8, 165u8, 3u8, 0u8, 3u8,
+                165u8, 3u8, 0u8, 0u8, 142u8, 3u8, 20u8, 3u8, 161u8, 3u8, 0u8, 3u8, 168u8, 0u8, 0u8,
+                0u8, 133u8, 3u8, 0u8, 0u8, 96u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 69u8,
+                3u8, 124u8, 31u8, 69u8, 3u8, 201u8, 3u8, 69u8, 3u8, 206u8, 3u8, 0u8, 0u8, 0u8, 0u8,
+                66u8, 3u8, 201u8, 3u8, 69u8, 3u8, 246u8, 31u8, 0u8, 3u8, 159u8, 3u8, 0u8, 0u8,
+                140u8, 3u8, 0u8, 3u8, 169u8, 3u8, 0u8, 0u8, 143u8, 3u8, 0u8, 0u8, 0u8, 0u8, 0u8,
+                0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
+                0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
+                0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 193u8, 5u8, 73u8, 251u8,
+                194u8, 5u8, 73u8, 251u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 17u8, 0u8, 0u8,
+                0u8, 15u8, 0u8, 0u8, 0u8, 13u8, 0u8, 0u8, 0u8, 11u8, 0u8, 0u8, 0u8, 9u8, 0u8, 0u8,
+                0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
+                0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
+                0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
+                0u8, 0u8, 0u8, 0u8, 0u8, 7u8, 0u8, 0u8, 0u8, 5u8, 0u8, 0u8, 0u8, 3u8, 0u8, 0u8,
+                0u8, 1u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
+                0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
+                0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
+                0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
+                0u8,
+            ])
+        },
+    ),
+    scalars24: unsafe {
+        ::zerovec::ZeroVec::from_bytes_unchecked(&[
+            188u8, 209u8, 1u8, 111u8, 209u8, 1u8, 187u8, 209u8, 1u8, 111u8, 209u8, 1u8, 188u8,
+            209u8, 1u8, 110u8, 209u8, 1u8, 187u8, 209u8, 1u8, 110u8, 209u8, 1u8, 95u8, 209u8, 1u8,
+            114u8, 209u8, 1u8, 95u8, 209u8, 1u8, 113u8, 209u8, 1u8, 95u8, 209u8, 1u8, 112u8, 209u8,
+            1u8, 95u8, 209u8, 1u8, 111u8, 209u8, 1u8, 95u8, 209u8, 1u8, 110u8, 209u8, 1u8,
+        ])
+    },
+};
diff --git a/provider/testdata/data/baked/normalizer/mod.rs b/provider/testdata/data/baked/normalizer/mod.rs
index aa5cbb67114..8f1b8bfce24 100644
--- a/provider/testdata/data/baked/normalizer/mod.rs
+++ b/provider/testdata/data/baked/normalizer/mod.rs
@@ -1,5 +1,6 @@
 // @generated
 pub mod comp_v1;
+pub mod decomp_v1;
 pub mod nfc_v1;
 pub mod nfd_v1;
 pub mod nfdex_v1;
diff --git a/provider/testdata/data/icuexport/norm/small/decompositionex.toml b/provider/testdata/data/icuexport/norm/small/decompositionex.toml
new file mode 100644
index 00000000000..6548ebca57a
--- /dev/null
+++ b/provider/testdata/data/icuexport/norm/small/decompositionex.toml
@@ -0,0 +1,100 @@
+# Copyright (C) 2021 and later: Unicode, Inc. and others.
+# License & terms of use: http://www.unicode.org/copyright.html
+#
+# file name: decompositionex
+#
+# machine-generated by: icuexportdata.cpp
+
+scalars32 = [
+  0x1d1bc,0x1d16f,0x1d1bb,0x1d16f,0x1d1bc,0x1d16e,0x1d1bb,0x1d16e,0x1d15f,0x1d172,0x1d15f,0x1d171,0x1d15f,0x1d170,0x1d15f,0x1d16f,
+  0x1d15f,0x1d16e
+]
+[trie]
+index = [
+  0,0x40,0,0,0,0,0,0x6b,0xa7,0,0,0,0,0,0xd9,0,
+  0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+  0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+  0,0,0,0x10e,0,0,0,0x131,0,0,0,0,0,0,0,0,
+  0x10b,0x11b,0x11b,0x11e,0x11b,0x11b,0x11b,0x13c,0,0x10,0x20,0x30,0x40,0x50,0x60,0x70,
+  0,0x10,0x20,0x30,0,0x10,0x20,0x30,0,0x10,0x20,0x30,0,0x10,0x20,0x30,
+  0,0x10,0x20,0x30,0x6b,0x7b,0x8b,0x9b,0xa7,0xb7,0xc7,0xd7,0,0x10,0x20,0x30,
+  0,0x10,0x20,0x30,0,0x10,0x20,0x30,0,0x10,0x20,0x30,0,0x10,0x20,0x30,
+  0xd9,0xe9,0xf9,0x109,0,0x10,0x20,0x30,0,0x10,0x20,0x30,0,0x10,0x20,0x30,
+  0,0x10,0x20,0x30,0,0x10,0x20,0x30,0,0x10,0x20,0x30,0,0x10,0x20,0x30,
+  0,0x10,0x20,0x30,0x10e,0x11e,0x12e,0x13e,0,0x10,0x20,0x30,0,0x10,0x20,0x30,
+  0,0x10,0x20,0x30,0x131,0x141,0x151,0x161,0x169,0x175,0x183,0x193,0x19d,0x1ad,0x1bb,0x1c5,
+  0,0,0x1d1,0x1e1,0x1f1,0x201,0x211,0x221,0x22f,0x23f,0x24d,0x25d,0x26d,0x27b,0x28b,0x29b,
+  0x2ab,0x2bb,0x2cb,0x2db,0x2ea,0x2fa,0x30a,0x31a,0,0,0,0,0,0,0,0,
+  0,0,0,0,0,0,0,0,0,0,0x326,0,0,0,0,0,
+  0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+  0,0x336,0,0,0,0,0x33b,0x34b,0,0,0,0x48,0x68,0x84,0x84,0x84,
+  0x84,0x98,0x84,0xf,0xf,0xf,0xf,0xf,0xf,0xf,0xb8,0xf,0xf,0xf,0xf,0xf,
+  0xf,0xf,0xf,0xf,0xf,0xf,0xf,0xf,0xf,0xf,0xf,0xf,0xf,0xf,0xf,0xf,
+  0xf,0xf,0xf,0xf,0xf,0xf,0xf,0xf,0xf,0xf,0xf,0xd8,0xf,0xf,0xf,0xf,
+  0xf,0xf,0xf,0xf,0xeb,0xffee
+]
+data_32 = [
+  0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+  0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+  0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+  0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+  0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+  0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+  0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+  0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+  0xdc0304,0xfc0304,0xdc0301,0xfc0301,0xdc030c,0xfc030c,0xdc0300,0xfc0300,0,0xc40304,0xe40304,0x2260304,0x2270304,0,0,0,
+  0,0,0,0,0,0,0,0x1ea0304,0x1eb0304,0,0,0,0,0,0,0,
+  0,0,0,0,0,0xc50301,0xe50301,0,0,0,0,0,0,0,0,0,
+  0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+  0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+  0,0xd60304,0xf60304,0xd50304,0xf50304,0,0,0x22e0304,0x22f0304,0,0,0,0,0,0,0,
+  0,0,0,0,0,0,0,0,0,0x3ca0301,0,0,0,0,0,0,
+  0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+  0,0,0,0,0,0,0,0,0,0x3cb0301,0,0,0,0,0,0,
+  0,0,0,0,0,0,0,0,0,0xcca0cd5,0,0,0,0,0,0,
+  0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+  0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+  0,0,0,0,0,0,0,0,0,0,0,0,0,0,0xddc0dca,0,
+  0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+  0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+  0,0xc70301,0xe70301,0,0,0,0,0,0,0x1120300,0x1130300,0x1120301,0x1130301,0,0,0,
+  0,0x2280306,0x2290306,0,0,0,0,0,0,0,0,0,0,0,0,0,
+  0,0xcf0301,0xef0301,0,0,0,0,0,0,0,0,0x1e360304,0x1e370304,0,0,0,
+  0,0,0,0,0,0,0,0,0,0xd50301,0xf50301,0xd50308,0xf50308,0x14c0300,0x14d0300,0x14c0301,
+  0x14d0301,0,0,0,0,0,0,0,0,0x1e5a0304,0x1e5b0304,0,0,0,0,0x15a0307,
+  0x15b0307,0x1600307,0x1610307,0x1e620307,0x1e630307,0,0,0,0,0,0,0,0,0x1680301,0x1690301,0x16a0308,
+  0x16b0308,0,0,0,0,0xc20301,0xe20301,0xc20300,0xe20300,0xc20309,0xe20309,0xc20303,0xe20303,0x1ea00302,0x1ea10302,0x1020301,
+  0x1030301,0x1020300,0x1030300,0x1020309,0x1030309,0x1020303,0x1030303,0x1ea00306,0x1ea10306,0,0,0,0,0,0,0xca0301,
+  0xea0301,0xca0300,0xea0300,0xca0309,0xea0309,0xca0303,0xea0303,0x1eb80302,0x1eb90302,0,0,0,0,0,0,0,
+  0,0xd40301,0xf40301,0xd40300,0xf40300,0xd40309,0xf40309,0xd40303,0xf40303,0x1ecc0302,0x1ecd0302,0x1a00301,0x1a10301,0x1a00300,0x1a10300,0x1a00309,
+  0x1a10309,0x1a00303,0x1a10303,0x1a00323,0x1a10323,0,0,0,0,0x1af0301,0x1b00301,0x1af0300,0x1b00300,0x1af0309,0x1b00309,0x1af0303,
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+  0,0x1f000300,0x1f010300,0x1f000301,0x1f010301,0x1f000342,0x1f010342,0,0,0x1f080300,0x1f090300,0x1f080301,0x1f090301,0x1f080342,0x1f090342,0,
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+  0x3c90342,0x1ff60345,0x39f0300,0x38c0000,0x3a90300,0x38f0000,0,0,0,0,0,0,0,0,0,0,
+  0,0,0xfb4905c1,0xfb4905c2,0,0,0x11,0xf,0xd,0xb,9,0,0,0,0,0,
+  0,0,0,0,0,0,0,0,7,5,3,1,0,0,0,0,
+  0,0,0,0,0,0,0,0,0,0,0
+]
+indexLength = 326
+dataLength = 859
+highStart = 0x1d200
+shifted12HighStart = 0x1e
+type = 1
+valueWidth = 1
+index3NullOffset = 0xf
+dataNullOffset = 0x0
+nullValue = 0x0
diff --git a/provider/testdata/data/json/fingerprints.csv b/provider/testdata/data/json/fingerprints.csv
index 5332f219090..9db448999cb 100644
--- a/provider/testdata/data/json/fingerprints.csv
+++ b/provider/testdata/data/json/fingerprints.csv
@@ -923,6 +923,7 @@ list/unit@1, und, 267B, ab8cc47b97781d052232b4c5ea96b5fa6a0370262ae18cba539dd349
 locale_canonicalizer/aliases@1, und, 18500B, 231601ea4c6b6ce73165ffbc5c0d9d448625d677cee0733cb00af2ec32a5d2ef
 locale_canonicalizer/likelysubtags@1, und, 87515B, 6f6ee5eacd835e2eeb53e32e42a85fb9f6ef3957cd38436e635c8b9c0f3d373d
 normalizer/comp@1, und, 29836B, 634be78f876811cd829efa0d9e2ff29d28b8f13696b527df30c7ef6f36820a47
+normalizer/decomp@1, und, 14378B, 25065fed55263cf13bcf9bd11384512ab4a6b041b58a14cdd6a80ddbd722c26c
 normalizer/nfc@1, und, 5802B, f2be11a3cb8b2cbafd8b813a84fcbe37c415ab707ac287e1c5c5f1d99222e821
 normalizer/nfd@1, und, 62051B, c07e1669fed58be2bcc596baa7a2b7ec27fcaf3f2a80f9f2eb987a455fd2288d
 normalizer/nfdex@1, und, 13980B, e112222c10c299a907eba832c013258902c59f175d2d8cc8cad4975509100235
diff --git a/provider/testdata/data/json/normalizer/decomp@1/und.json b/provider/testdata/data/json/normalizer/decomp@1/und.json
new file mode 100644
index 00000000000..1f076796b09
--- /dev/null
+++ b/provider/testdata/data/json/normalizer/decomp@1/und.json
@@ -0,0 +1,1293 @@
+{
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+      "null_value": 0,
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diff --git a/provider/testdata/data/postcard/fingerprints.csv b/provider/testdata/data/postcard/fingerprints.csv
index 511a44b3266..8688cda712c 100644
--- a/provider/testdata/data/postcard/fingerprints.csv
+++ b/provider/testdata/data/postcard/fingerprints.csv
@@ -923,6 +923,7 @@ list/unit@1, und, 17B, 5b9f632a33abd67185c088f662de58929ec350487d7855e8a78ee9eb4
 locale_canonicalizer/aliases@1, und, 8988B, 3e2ad76382e532d7c87771c78bd75e1e4c4abbbc5f436e7e1091fae157391bd4
 locale_canonicalizer/likelysubtags@1, und, 18793B, c4c5a1819d8e3ca8f1cabdd3548b6e1ba311586a0f7e1c50c90d93bc97263eae
 normalizer/comp@1, und, 5092B, bb6312f594d6d73110877a3b4fe8717849fa852d2d7ad2a0be07f3518cc848bc
+normalizer/decomp@1, und, 4155B, 6e407fdf0c526c7d9f0173e542fd09f4bfe7f3007e88d5072eb9d6d0a9a17f86
 normalizer/nfc@1, und, 2194B, 1013e6b016935c66e008c39375c6bd4da65e7780a007f96a4a1a61495fa09720
 normalizer/nfd@1, und, 18579B, ad4a03a631dbc7e978451a189b154ab6287453611b31d8e51cae251e52f1bdc9
 normalizer/nfdex@1, und, 2051B, 5b3b10bb1a5580c882bdefd57809bb8acb7de3b21fae52637a4a198572af1a53
diff --git a/provider/testdata/data/testdata.postcard b/provider/testdata/data/testdata.postcard
index f975aa4bbb5..1aa09a2bd7b 100644
Binary files a/provider/testdata/data/testdata.postcard and b/provider/testdata/data/testdata.postcard differ