diff --git a/docs/user_guide/loadflow.rst b/docs/user_guide/loadflow.rst
index 6a0302886..1ab017b9d 100644
--- a/docs/user_guide/loadflow.rst
+++ b/docs/user_guide/loadflow.rst
@@ -91,11 +91,11 @@ possible values if applicable, using:
 .. doctest::
     :options: +NORMALIZE_WHITESPACE
 
-    >>> lf.get_provider_parameters().iloc[:2]
-                                        description    type      default                                possible_values
+    >>> lf.get_provider_parameters().query('name == "slackBusSelectionMode" or name == "slackBusesIds"')
+                                category_key               description         type      default                                possible_values
     name
-    slackBusSelectionMode  Slack bus selection mode  STRING  MOST_MESHED  [FIRST, MOST_MESHED, NAME, LARGEST_GENERATOR]
-    slackBusesIds                     Slack bus IDs  STRING_LIST
+    slackBusSelectionMode  SlackDistribution  Slack bus selection mode       STRING  MOST_MESHED  [FIRST, MOST_MESHED, NAME, LARGEST_GENERATOR]
+    slackBusesIds          SlackDistribution             Slack bus IDs  STRING_LIST
 
 For instance, OLF supports configuration of slack bus from its ID like this:
 
diff --git a/java/src/main/java/com/powsybl/python/loadflow/LoadFlowCUtils.java b/java/src/main/java/com/powsybl/python/loadflow/LoadFlowCUtils.java
index 60f47f1fb..c323b2e3f 100644
--- a/java/src/main/java/com/powsybl/python/loadflow/LoadFlowCUtils.java
+++ b/java/src/main/java/com/powsybl/python/loadflow/LoadFlowCUtils.java
@@ -21,6 +21,7 @@
 import com.powsybl.python.commons.PyPowsyblConfiguration;
 import org.graalvm.nativeimage.UnmanagedMemory;
 
+import java.util.Comparator;
 import java.util.Map;
 import java.util.Objects;
 import java.util.stream.Collectors;
@@ -31,8 +32,9 @@
 public final class LoadFlowCUtils {
 
     static final DataframeMapper<LoadFlowProvider, Void> SPECIFIC_PARAMETERS_MAPPER = new DataframeMapperBuilder<LoadFlowProvider, Parameter, Void>()
-            .itemsProvider(provider -> provider.getSpecificParameters())
+            .itemsProvider(provider -> provider.getSpecificParameters().stream().sorted(Comparator.comparing(Parameter::getCategoryKey).thenComparing(Parameter::getName)).toList())
             .stringsIndex("name", Parameter::getName)
+            .strings("category_key", p -> Objects.toString(p.getCategoryKey(), ""))
             .strings("description", Parameter::getDescription)
             .enums("type", ParameterType.class, Parameter::getType)
             .strings("default", p -> Objects.toString(p.getDefaultValue(), ""))
diff --git a/pypowsybl/loadflow/impl/loadflow.py b/pypowsybl/loadflow/impl/loadflow.py
index c6ea7902f..998c166b1 100644
--- a/pypowsybl/loadflow/impl/loadflow.py
+++ b/pypowsybl/loadflow/impl/loadflow.py
@@ -135,12 +135,16 @@ def get_provider_parameters(provider: str = None) -> DataFrame:
        .. doctest::
 
            >>> parameters = pp.loadflow.get_provider_parameters('OpenLoadFlow')
+           >>> parameters['category_key']['slackBusSelectionMode']
+           'SlackDistribution'
            >>> parameters['description']['slackBusSelectionMode']
            'Slack bus selection mode'
            >>> parameters['type']['slackBusSelectionMode']
            'STRING'
            >>> parameters['default']['slackBusSelectionMode']
            'MOST_MESHED'
+           >>> parameters['possible_values']['slackBusSelectionMode']
+           '[FIRST, MOST_MESHED, NAME, LARGEST_GENERATOR]'
     """
     series_array = _pypowsybl.create_loadflow_provider_parameters_series_array('' if provider is None else provider)
     return create_data_frame_from_series_array(series_array)