diff --git a/README.md b/README.md
index 98d85ad..eb9cdbd 100644
--- a/README.md
+++ b/README.md
@@ -159,7 +159,7 @@ Available targets:
 |------|--------|---------|
 | <a name="module_aws_config_label"></a> [aws\_config\_label](#module\_aws\_config\_label) | cloudposse/label/null | 0.25.0 |
 | <a name="module_storage"></a> [storage](#module\_storage) | cloudposse/s3-log-storage/aws | 0.26.0 |
-| <a name="module_this"></a> [this](#module\_this) | cloudposse/label/null | 0.24.1 |
+| <a name="module_this"></a> [this](#module\_this) | cloudposse/label/null | 0.25.0 |
 
 ## Resources
 
@@ -175,38 +175,41 @@ Available targets:
 |------|-------------|------|---------|:--------:|
 | <a name="input_abort_incomplete_multipart_upload_days"></a> [abort\_incomplete\_multipart\_upload\_days](#input\_abort\_incomplete\_multipart\_upload\_days) | Maximum time (in days) that you want to allow multipart uploads to remain in progress | `number` | `5` | no |
 | <a name="input_access_log_bucket_name"></a> [access\_log\_bucket\_name](#input\_access\_log\_bucket\_name) | Name of the S3 bucket where s3 access log will be sent to | `string` | `""` | no |
-| <a name="input_additional_tag_map"></a> [additional\_tag\_map](#input\_additional\_tag\_map) | Additional tags for appending to tags\_as\_list\_of\_maps. Not added to `tags`. | `map(string)` | `{}` | no |
+| <a name="input_additional_tag_map"></a> [additional\_tag\_map](#input\_additional\_tag\_map) | Additional key-value pairs to add to each map in `tags_as_list_of_maps`. Not added to `tags` or `id`.<br>This is for some rare cases where resources want additional configuration of tags<br>and therefore take a list of maps with tag key, value, and additional configuration. | `map(string)` | `{}` | no |
 | <a name="input_allow_ssl_requests_only"></a> [allow\_ssl\_requests\_only](#input\_allow\_ssl\_requests\_only) | Set to `true` to require requests to use Secure Socket Layer (HTTPS/SSL). This will explicitly deny access to HTTP requests | `bool` | `false` | no |
-| <a name="input_attributes"></a> [attributes](#input\_attributes) | Additional attributes (e.g. `1`) | `list(string)` | `[]` | no |
+| <a name="input_attributes"></a> [attributes](#input\_attributes) | ID element. Additional attributes (e.g. `workers` or `cluster`) to add to `id`,<br>in the order they appear in the list. New attributes are appended to the<br>end of the list. The elements of the list are joined by the `delimiter`<br>and treated as a single ID element. | `list(string)` | `[]` | no |
 | <a name="input_bucket_notifications_enabled"></a> [bucket\_notifications\_enabled](#input\_bucket\_notifications\_enabled) | Send notifications for the object created events. Used for 3rd-party log collection from a bucket | `bool` | `false` | no |
 | <a name="input_bucket_notifications_prefix"></a> [bucket\_notifications\_prefix](#input\_bucket\_notifications\_prefix) | Prefix filter. Used to manage object notifications | `string` | `""` | no |
 | <a name="input_bucket_notifications_type"></a> [bucket\_notifications\_type](#input\_bucket\_notifications\_type) | Type of the notification configuration. Only SQS is supported. | `string` | `"SQS"` | no |
-| <a name="input_context"></a> [context](#input\_context) | Single object for setting entire context at once.<br>See description of individual variables for details.<br>Leave string and numeric variables as `null` to use default value.<br>Individual variable settings (non-null) override settings in context object,<br>except for attributes, tags, and additional\_tag\_map, which are merged. | `any` | <pre>{<br>  "additional_tag_map": {},<br>  "attributes": [],<br>  "delimiter": null,<br>  "enabled": true,<br>  "environment": null,<br>  "id_length_limit": null,<br>  "label_key_case": null,<br>  "label_order": [],<br>  "label_value_case": null,<br>  "name": null,<br>  "namespace": null,<br>  "regex_replace_chars": null,<br>  "stage": null,<br>  "tags": {}<br>}</pre> | no |
-| <a name="input_delimiter"></a> [delimiter](#input\_delimiter) | Delimiter to be used between `namespace`, `environment`, `stage`, `name` and `attributes`.<br>Defaults to `-` (hyphen). Set to `""` to use no delimiter at all. | `string` | `null` | no |
+| <a name="input_context"></a> [context](#input\_context) | Single object for setting entire context at once.<br>See description of individual variables for details.<br>Leave string and numeric variables as `null` to use default value.<br>Individual variable settings (non-null) override settings in context object,<br>except for attributes, tags, and additional\_tag\_map, which are merged. | `any` | <pre>{<br>  "additional_tag_map": {},<br>  "attributes": [],<br>  "delimiter": null,<br>  "descriptor_formats": {},<br>  "enabled": true,<br>  "environment": null,<br>  "id_length_limit": null,<br>  "label_key_case": null,<br>  "label_order": [],<br>  "label_value_case": null,<br>  "labels_as_tags": [<br>    "unset"<br>  ],<br>  "name": null,<br>  "namespace": null,<br>  "regex_replace_chars": null,<br>  "stage": null,<br>  "tags": {},<br>  "tenant": null<br>}</pre> | no |
+| <a name="input_delimiter"></a> [delimiter](#input\_delimiter) | Delimiter to be used between ID elements.<br>Defaults to `-` (hyphen). Set to `""` to use no delimiter at all. | `string` | `null` | no |
+| <a name="input_descriptor_formats"></a> [descriptor\_formats](#input\_descriptor\_formats) | Describe additional descriptors to be output in the `descriptors` output map.<br>Map of maps. Keys are names of descriptors. Values are maps of the form<br>`{<br>   format = string<br>   labels = list(string)<br>}`<br>(Type is `any` so the map values can later be enhanced to provide additional options.)<br>`format` is a Terraform format string to be passed to the `format()` function.<br>`labels` is a list of labels, in order, to pass to `format()` function.<br>Label values will be normalized before being passed to `format()` so they will be<br>identical to how they appear in `id`.<br>Default is `{}` (`descriptors` output will be empty). | `any` | `{}` | no |
 | <a name="input_enable_glacier_transition"></a> [enable\_glacier\_transition](#input\_enable\_glacier\_transition) | Enables the transition to AWS Glacier which can cause unnecessary costs for huge amount of small files | `bool` | `true` | no |
 | <a name="input_enabled"></a> [enabled](#input\_enabled) | Set to false to prevent the module from creating any resources | `bool` | `null` | no |
-| <a name="input_environment"></a> [environment](#input\_environment) | Environment, e.g. 'uw2', 'us-west-2', OR 'prod', 'staging', 'dev', 'UAT' | `string` | `null` | no |
+| <a name="input_environment"></a> [environment](#input\_environment) | ID element. Usually used for region e.g. 'uw2', 'us-west-2', OR role 'prod', 'staging', 'dev', 'UAT' | `string` | `null` | no |
 | <a name="input_expiration_days"></a> [expiration\_days](#input\_expiration\_days) | Number of days after which to expunge the objects | `number` | `90` | no |
 | <a name="input_force_destroy"></a> [force\_destroy](#input\_force\_destroy) | (Optional, Default:false ) A boolean that indicates all objects should be deleted from the bucket so that the bucket can be destroyed without error. These objects are not recoverable | `bool` | `false` | no |
 | <a name="input_glacier_transition_days"></a> [glacier\_transition\_days](#input\_glacier\_transition\_days) | Number of days after which to move the data to the glacier storage tier | `number` | `60` | no |
-| <a name="input_id_length_limit"></a> [id\_length\_limit](#input\_id\_length\_limit) | Limit `id` to this many characters (minimum 6).<br>Set to `0` for unlimited length.<br>Set to `null` for default, which is `0`.<br>Does not affect `id_full`. | `number` | `null` | no |
+| <a name="input_id_length_limit"></a> [id\_length\_limit](#input\_id\_length\_limit) | Limit `id` to this many characters (minimum 6).<br>Set to `0` for unlimited length.<br>Set to `null` for keep the existing setting, which defaults to `0`.<br>Does not affect `id_full`. | `number` | `null` | no |
 | <a name="input_kms_master_key_arn"></a> [kms\_master\_key\_arn](#input\_kms\_master\_key\_arn) | The AWS KMS master key ARN used for the SSE-KMS encryption. This can only be used when you set the value of sse\_algorithm as aws:kms. The default aws/s3 AWS KMS master key is used if this element is absent while the sse\_algorithm is aws:kms | `string` | `""` | no |
-| <a name="input_label_key_case"></a> [label\_key\_case](#input\_label\_key\_case) | The letter case of label keys (`tag` names) (i.e. `name`, `namespace`, `environment`, `stage`, `attributes`) to use in `tags`.<br>Possible values: `lower`, `title`, `upper`.<br>Default value: `title`. | `string` | `null` | no |
-| <a name="input_label_order"></a> [label\_order](#input\_label\_order) | The naming order of the id output and Name tag.<br>Defaults to ["namespace", "environment", "stage", "name", "attributes"].<br>You can omit any of the 5 elements, but at least one must be present. | `list(string)` | `null` | no |
-| <a name="input_label_value_case"></a> [label\_value\_case](#input\_label\_value\_case) | The letter case of output label values (also used in `tags` and `id`).<br>Possible values: `lower`, `title`, `upper` and `none` (no transformation).<br>Default value: `lower`. | `string` | `null` | no |
+| <a name="input_label_key_case"></a> [label\_key\_case](#input\_label\_key\_case) | Controls the letter case of the `tags` keys (label names) for tags generated by this module.<br>Does not affect keys of tags passed in via the `tags` input.<br>Possible values: `lower`, `title`, `upper`.<br>Default value: `title`. | `string` | `null` | no |
+| <a name="input_label_order"></a> [label\_order](#input\_label\_order) | The order in which the labels (ID elements) appear in the `id`.<br>Defaults to ["namespace", "environment", "stage", "name", "attributes"].<br>You can omit any of the 6 labels ("tenant" is the 6th), but at least one must be present. | `list(string)` | `null` | no |
+| <a name="input_label_value_case"></a> [label\_value\_case](#input\_label\_value\_case) | Controls the letter case of ID elements (labels) as included in `id`,<br>set as tag values, and output by this module individually.<br>Does not affect values of tags passed in via the `tags` input.<br>Possible values: `lower`, `title`, `upper` and `none` (no transformation).<br>Set this to `title` and set `delimiter` to `""` to yield Pascal Case IDs.<br>Default value: `lower`. | `string` | `null` | no |
+| <a name="input_labels_as_tags"></a> [labels\_as\_tags](#input\_labels\_as\_tags) | Set of labels (ID elements) to include as tags in the `tags` output.<br>Default is to include all labels.<br>Tags with empty values will not be included in the `tags` output.<br>Set to `[]` to suppress all generated tags.<br>**Notes:**<br>  The value of the `name` tag, if included, will be the `id`, not the `name`.<br>  Unlike other `null-label` inputs, the initial setting of `labels_as_tags` cannot be<br>  changed in later chained modules. Attempts to change it will be silently ignored. | `set(string)` | <pre>[<br>  "default"<br>]</pre> | no |
 | <a name="input_lifecycle_prefix"></a> [lifecycle\_prefix](#input\_lifecycle\_prefix) | Prefix filter. Used to manage object lifecycle events | `string` | `""` | no |
 | <a name="input_lifecycle_rule_enabled"></a> [lifecycle\_rule\_enabled](#input\_lifecycle\_rule\_enabled) | Enable lifecycle events on this bucket | `bool` | `true` | no |
 | <a name="input_lifecycle_tags"></a> [lifecycle\_tags](#input\_lifecycle\_tags) | Tags filter. Used to manage object lifecycle events | `map(string)` | `{}` | no |
-| <a name="input_name"></a> [name](#input\_name) | Solution name, e.g. 'app' or 'jenkins' | `string` | `null` | no |
-| <a name="input_namespace"></a> [namespace](#input\_namespace) | Namespace, which could be your organization name or abbreviation, e.g. 'eg' or 'cp' | `string` | `null` | no |
+| <a name="input_name"></a> [name](#input\_name) | ID element. Usually the component or solution name, e.g. 'app' or 'jenkins'.<br>This is the only ID element not also included as a `tag`.<br>The "name" tag is set to the full `id` string. There is no tag with the value of the `name` input. | `string` | `null` | no |
+| <a name="input_namespace"></a> [namespace](#input\_namespace) | ID element. Usually an abbreviation of your organization name, e.g. 'eg' or 'cp', to help ensure generated IDs are globally unique | `string` | `null` | no |
 | <a name="input_noncurrent_version_expiration_days"></a> [noncurrent\_version\_expiration\_days](#input\_noncurrent\_version\_expiration\_days) | Specifies when noncurrent object versions expire | `number` | `90` | no |
 | <a name="input_noncurrent_version_transition_days"></a> [noncurrent\_version\_transition\_days](#input\_noncurrent\_version\_transition\_days) | Specifies when noncurrent object versions transitions | `number` | `30` | no |
 | <a name="input_policy"></a> [policy](#input\_policy) | A valid bucket policy JSON document. Note that if the policy document is not specific enough (but still valid), Terraform may view the policy as constantly changing in a terraform plan. In this case, please make sure you use the verbose/specific version of the policy | `string` | `""` | no |
-| <a name="input_regex_replace_chars"></a> [regex\_replace\_chars](#input\_regex\_replace\_chars) | Regex to replace chars with empty string in `namespace`, `environment`, `stage` and `name`.<br>If not set, `"/[^a-zA-Z0-9-]/"` is used to remove all characters other than hyphens, letters and digits. | `string` | `null` | no |
+| <a name="input_regex_replace_chars"></a> [regex\_replace\_chars](#input\_regex\_replace\_chars) | Terraform regular expression (regex) string.<br>Characters matching the regex will be removed from the ID elements.<br>If not set, `"/[^a-zA-Z0-9-]/"` is used to remove all characters other than hyphens, letters and digits. | `string` | `null` | no |
 | <a name="input_sse_algorithm"></a> [sse\_algorithm](#input\_sse\_algorithm) | The server-side encryption algorithm to use. Valid values are AES256 and aws:kms | `string` | `"AES256"` | no |
-| <a name="input_stage"></a> [stage](#input\_stage) | Stage, e.g. 'prod', 'staging', 'dev', OR 'source', 'build', 'test', 'deploy', 'release' | `string` | `null` | no |
+| <a name="input_stage"></a> [stage](#input\_stage) | ID element. Usually used to indicate role, e.g. 'prod', 'staging', 'source', 'build', 'test', 'deploy', 'release' | `string` | `null` | no |
 | <a name="input_standard_transition_days"></a> [standard\_transition\_days](#input\_standard\_transition\_days) | Number of days to persist in the standard storage tier before moving to the infrequent access tier | `number` | `30` | no |
-| <a name="input_tags"></a> [tags](#input\_tags) | Additional tags (e.g. `map('BusinessUnit','XYZ')` | `map(string)` | `{}` | no |
+| <a name="input_tags"></a> [tags](#input\_tags) | Additional tags (e.g. `{'BusinessUnit': 'XYZ'}`).<br>Neither the tag keys nor the tag values will be modified by this module. | `map(string)` | `{}` | no |
+| <a name="input_tenant"></a> [tenant](#input\_tenant) | ID element \_(Rarely used, not included by default)\_. A customer identifier, indicating who this instance of a resource is for | `string` | `null` | no |
 
 ## Outputs
 
diff --git a/context.tf b/context.tf
index 81f99b4..5e0ef88 100644
--- a/context.tf
+++ b/context.tf
@@ -8,6 +8,8 @@
 # Cloud Posse's standard configuration inputs suitable for passing
 # to Cloud Posse modules.
 #
+# curl -sL https://raw.githubusercontent.com/cloudposse/terraform-null-label/master/exports/context.tf -o context.tf
+#
 # Modules should access the whole context as `module.this.context`
 # to get the input variables with nulls for defaults,
 # for example `context = module.this.context`,
@@ -20,10 +22,11 @@
 
 module "this" {
   source  = "cloudposse/label/null"
-  version = "0.24.1" # requires Terraform >= 0.13.0
+  version = "0.25.0" # requires Terraform >= 0.13.0
 
   enabled             = var.enabled
   namespace           = var.namespace
+  tenant              = var.tenant
   environment         = var.environment
   stage               = var.stage
   name                = var.name
@@ -36,6 +39,8 @@ module "this" {
   id_length_limit     = var.id_length_limit
   label_key_case      = var.label_key_case
   label_value_case    = var.label_value_case
+  descriptor_formats  = var.descriptor_formats
+  labels_as_tags      = var.labels_as_tags
 
   context = var.context
 }
@@ -47,6 +52,7 @@ variable "context" {
   default = {
     enabled             = true
     namespace           = null
+    tenant              = null
     environment         = null
     stage               = null
     name                = null
@@ -59,6 +65,15 @@ variable "context" {
     id_length_limit     = null
     label_key_case      = null
     label_value_case    = null
+    descriptor_formats  = {}
+    # Note: we have to use [] instead of null for unset lists due to
+    # https://github.com/hashicorp/terraform/issues/28137
+    # which was not fixed until Terraform 1.0.0,
+    # but we want the default to be all the labels in `label_order`
+    # and we want users to be able to prevent all tag generation
+    # by setting `labels_as_tags` to `[]`, so we need
+    # a different sentinel to indicate "default"
+    labels_as_tags = ["unset"]
   }
   description = <<-EOT
     Single object for setting entire context at once.
@@ -88,32 +103,42 @@ variable "enabled" {
 variable "namespace" {
   type        = string
   default     = null
-  description = "Namespace, which could be your organization name or abbreviation, e.g. 'eg' or 'cp'"
+  description = "ID element. Usually an abbreviation of your organization name, e.g. 'eg' or 'cp', to help ensure generated IDs are globally unique"
+}
+
+variable "tenant" {
+  type        = string
+  default     = null
+  description = "ID element _(Rarely used, not included by default)_. A customer identifier, indicating who this instance of a resource is for"
 }
 
 variable "environment" {
   type        = string
   default     = null
-  description = "Environment, e.g. 'uw2', 'us-west-2', OR 'prod', 'staging', 'dev', 'UAT'"
+  description = "ID element. Usually used for region e.g. 'uw2', 'us-west-2', OR role 'prod', 'staging', 'dev', 'UAT'"
 }
 
 variable "stage" {
   type        = string
   default     = null
-  description = "Stage, e.g. 'prod', 'staging', 'dev', OR 'source', 'build', 'test', 'deploy', 'release'"
+  description = "ID element. Usually used to indicate role, e.g. 'prod', 'staging', 'source', 'build', 'test', 'deploy', 'release'"
 }
 
 variable "name" {
   type        = string
   default     = null
-  description = "Solution name, e.g. 'app' or 'jenkins'"
+  description = <<-EOT
+    ID element. Usually the component or solution name, e.g. 'app' or 'jenkins'.
+    This is the only ID element not also included as a `tag`.
+    The "name" tag is set to the full `id` string. There is no tag with the value of the `name` input.
+    EOT
 }
 
 variable "delimiter" {
   type        = string
   default     = null
   description = <<-EOT
-    Delimiter to be used between `namespace`, `environment`, `stage`, `name` and `attributes`.
+    Delimiter to be used between ID elements.
     Defaults to `-` (hyphen). Set to `""` to use no delimiter at all.
   EOT
 }
@@ -121,36 +146,64 @@ variable "delimiter" {
 variable "attributes" {
   type        = list(string)
   default     = []
-  description = "Additional attributes (e.g. `1`)"
+  description = <<-EOT
+    ID element. Additional attributes (e.g. `workers` or `cluster`) to add to `id`,
+    in the order they appear in the list. New attributes are appended to the
+    end of the list. The elements of the list are joined by the `delimiter`
+    and treated as a single ID element.
+    EOT
+}
+
+variable "labels_as_tags" {
+  type        = set(string)
+  default     = ["default"]
+  description = <<-EOT
+    Set of labels (ID elements) to include as tags in the `tags` output.
+    Default is to include all labels.
+    Tags with empty values will not be included in the `tags` output.
+    Set to `[]` to suppress all generated tags.
+    **Notes:**
+      The value of the `name` tag, if included, will be the `id`, not the `name`.
+      Unlike other `null-label` inputs, the initial setting of `labels_as_tags` cannot be
+      changed in later chained modules. Attempts to change it will be silently ignored.
+    EOT
 }
 
 variable "tags" {
   type        = map(string)
   default     = {}
-  description = "Additional tags (e.g. `map('BusinessUnit','XYZ')`"
+  description = <<-EOT
+    Additional tags (e.g. `{'BusinessUnit': 'XYZ'}`).
+    Neither the tag keys nor the tag values will be modified by this module.
+    EOT
 }
 
 variable "additional_tag_map" {
   type        = map(string)
   default     = {}
-  description = "Additional tags for appending to tags_as_list_of_maps. Not added to `tags`."
+  description = <<-EOT
+    Additional key-value pairs to add to each map in `tags_as_list_of_maps`. Not added to `tags` or `id`.
+    This is for some rare cases where resources want additional configuration of tags
+    and therefore take a list of maps with tag key, value, and additional configuration.
+    EOT
 }
 
 variable "label_order" {
   type        = list(string)
   default     = null
   description = <<-EOT
-    The naming order of the id output and Name tag.
+    The order in which the labels (ID elements) appear in the `id`.
     Defaults to ["namespace", "environment", "stage", "name", "attributes"].
-    You can omit any of the 5 elements, but at least one must be present.
-  EOT
+    You can omit any of the 6 labels ("tenant" is the 6th), but at least one must be present.
+    EOT
 }
 
 variable "regex_replace_chars" {
   type        = string
   default     = null
   description = <<-EOT
-    Regex to replace chars with empty string in `namespace`, `environment`, `stage` and `name`.
+    Terraform regular expression (regex) string.
+    Characters matching the regex will be removed from the ID elements.
     If not set, `"/[^a-zA-Z0-9-]/"` is used to remove all characters other than hyphens, letters and digits.
   EOT
 }
@@ -161,7 +214,7 @@ variable "id_length_limit" {
   description = <<-EOT
     Limit `id` to this many characters (minimum 6).
     Set to `0` for unlimited length.
-    Set to `null` for default, which is `0`.
+    Set to `null` for keep the existing setting, which defaults to `0`.
     Does not affect `id_full`.
   EOT
   validation {
@@ -174,7 +227,8 @@ variable "label_key_case" {
   type        = string
   default     = null
   description = <<-EOT
-    The letter case of label keys (`tag` names) (i.e. `name`, `namespace`, `environment`, `stage`, `attributes`) to use in `tags`.
+    Controls the letter case of the `tags` keys (label names) for tags generated by this module.
+    Does not affect keys of tags passed in via the `tags` input.
     Possible values: `lower`, `title`, `upper`.
     Default value: `title`.
   EOT
@@ -189,8 +243,11 @@ variable "label_value_case" {
   type        = string
   default     = null
   description = <<-EOT
-    The letter case of output label values (also used in `tags` and `id`).
+    Controls the letter case of ID elements (labels) as included in `id`,
+    set as tag values, and output by this module individually.
+    Does not affect values of tags passed in via the `tags` input.
     Possible values: `lower`, `title`, `upper` and `none` (no transformation).
+    Set this to `title` and set `delimiter` to `""` to yield Pascal Case IDs.
     Default value: `lower`.
   EOT
 
@@ -199,4 +256,24 @@ variable "label_value_case" {
     error_message = "Allowed values: `lower`, `title`, `upper`, `none`."
   }
 }
+
+variable "descriptor_formats" {
+  type        = any
+  default     = {}
+  description = <<-EOT
+    Describe additional descriptors to be output in the `descriptors` output map.
+    Map of maps. Keys are names of descriptors. Values are maps of the form
+    `{
+       format = string
+       labels = list(string)
+    }`
+    (Type is `any` so the map values can later be enhanced to provide additional options.)
+    `format` is a Terraform format string to be passed to the `format()` function.
+    `labels` is a list of labels, in order, to pass to `format()` function.
+    Label values will be normalized before being passed to `format()` so they will be
+    identical to how they appear in `id`.
+    Default is `{}` (`descriptors` output will be empty).
+    EOT
+}
+
 #### End of copy of cloudposse/terraform-null-label/variables.tf
diff --git a/docs/terraform.md b/docs/terraform.md
index 50739d9..b9aef7d 100644
--- a/docs/terraform.md
+++ b/docs/terraform.md
@@ -18,7 +18,7 @@
 |------|--------|---------|
 | <a name="module_aws_config_label"></a> [aws\_config\_label](#module\_aws\_config\_label) | cloudposse/label/null | 0.25.0 |
 | <a name="module_storage"></a> [storage](#module\_storage) | cloudposse/s3-log-storage/aws | 0.26.0 |
-| <a name="module_this"></a> [this](#module\_this) | cloudposse/label/null | 0.24.1 |
+| <a name="module_this"></a> [this](#module\_this) | cloudposse/label/null | 0.25.0 |
 
 ## Resources
 
@@ -34,38 +34,41 @@
 |------|-------------|------|---------|:--------:|
 | <a name="input_abort_incomplete_multipart_upload_days"></a> [abort\_incomplete\_multipart\_upload\_days](#input\_abort\_incomplete\_multipart\_upload\_days) | Maximum time (in days) that you want to allow multipart uploads to remain in progress | `number` | `5` | no |
 | <a name="input_access_log_bucket_name"></a> [access\_log\_bucket\_name](#input\_access\_log\_bucket\_name) | Name of the S3 bucket where s3 access log will be sent to | `string` | `""` | no |
-| <a name="input_additional_tag_map"></a> [additional\_tag\_map](#input\_additional\_tag\_map) | Additional tags for appending to tags\_as\_list\_of\_maps. Not added to `tags`. | `map(string)` | `{}` | no |
+| <a name="input_additional_tag_map"></a> [additional\_tag\_map](#input\_additional\_tag\_map) | Additional key-value pairs to add to each map in `tags_as_list_of_maps`. Not added to `tags` or `id`.<br>This is for some rare cases where resources want additional configuration of tags<br>and therefore take a list of maps with tag key, value, and additional configuration. | `map(string)` | `{}` | no |
 | <a name="input_allow_ssl_requests_only"></a> [allow\_ssl\_requests\_only](#input\_allow\_ssl\_requests\_only) | Set to `true` to require requests to use Secure Socket Layer (HTTPS/SSL). This will explicitly deny access to HTTP requests | `bool` | `false` | no |
-| <a name="input_attributes"></a> [attributes](#input\_attributes) | Additional attributes (e.g. `1`) | `list(string)` | `[]` | no |
+| <a name="input_attributes"></a> [attributes](#input\_attributes) | ID element. Additional attributes (e.g. `workers` or `cluster`) to add to `id`,<br>in the order they appear in the list. New attributes are appended to the<br>end of the list. The elements of the list are joined by the `delimiter`<br>and treated as a single ID element. | `list(string)` | `[]` | no |
 | <a name="input_bucket_notifications_enabled"></a> [bucket\_notifications\_enabled](#input\_bucket\_notifications\_enabled) | Send notifications for the object created events. Used for 3rd-party log collection from a bucket | `bool` | `false` | no |
 | <a name="input_bucket_notifications_prefix"></a> [bucket\_notifications\_prefix](#input\_bucket\_notifications\_prefix) | Prefix filter. Used to manage object notifications | `string` | `""` | no |
 | <a name="input_bucket_notifications_type"></a> [bucket\_notifications\_type](#input\_bucket\_notifications\_type) | Type of the notification configuration. Only SQS is supported. | `string` | `"SQS"` | no |
-| <a name="input_context"></a> [context](#input\_context) | Single object for setting entire context at once.<br>See description of individual variables for details.<br>Leave string and numeric variables as `null` to use default value.<br>Individual variable settings (non-null) override settings in context object,<br>except for attributes, tags, and additional\_tag\_map, which are merged. | `any` | <pre>{<br>  "additional_tag_map": {},<br>  "attributes": [],<br>  "delimiter": null,<br>  "enabled": true,<br>  "environment": null,<br>  "id_length_limit": null,<br>  "label_key_case": null,<br>  "label_order": [],<br>  "label_value_case": null,<br>  "name": null,<br>  "namespace": null,<br>  "regex_replace_chars": null,<br>  "stage": null,<br>  "tags": {}<br>}</pre> | no |
-| <a name="input_delimiter"></a> [delimiter](#input\_delimiter) | Delimiter to be used between `namespace`, `environment`, `stage`, `name` and `attributes`.<br>Defaults to `-` (hyphen). Set to `""` to use no delimiter at all. | `string` | `null` | no |
+| <a name="input_context"></a> [context](#input\_context) | Single object for setting entire context at once.<br>See description of individual variables for details.<br>Leave string and numeric variables as `null` to use default value.<br>Individual variable settings (non-null) override settings in context object,<br>except for attributes, tags, and additional\_tag\_map, which are merged. | `any` | <pre>{<br>  "additional_tag_map": {},<br>  "attributes": [],<br>  "delimiter": null,<br>  "descriptor_formats": {},<br>  "enabled": true,<br>  "environment": null,<br>  "id_length_limit": null,<br>  "label_key_case": null,<br>  "label_order": [],<br>  "label_value_case": null,<br>  "labels_as_tags": [<br>    "unset"<br>  ],<br>  "name": null,<br>  "namespace": null,<br>  "regex_replace_chars": null,<br>  "stage": null,<br>  "tags": {},<br>  "tenant": null<br>}</pre> | no |
+| <a name="input_delimiter"></a> [delimiter](#input\_delimiter) | Delimiter to be used between ID elements.<br>Defaults to `-` (hyphen). Set to `""` to use no delimiter at all. | `string` | `null` | no |
+| <a name="input_descriptor_formats"></a> [descriptor\_formats](#input\_descriptor\_formats) | Describe additional descriptors to be output in the `descriptors` output map.<br>Map of maps. Keys are names of descriptors. Values are maps of the form<br>`{<br>   format = string<br>   labels = list(string)<br>}`<br>(Type is `any` so the map values can later be enhanced to provide additional options.)<br>`format` is a Terraform format string to be passed to the `format()` function.<br>`labels` is a list of labels, in order, to pass to `format()` function.<br>Label values will be normalized before being passed to `format()` so they will be<br>identical to how they appear in `id`.<br>Default is `{}` (`descriptors` output will be empty). | `any` | `{}` | no |
 | <a name="input_enable_glacier_transition"></a> [enable\_glacier\_transition](#input\_enable\_glacier\_transition) | Enables the transition to AWS Glacier which can cause unnecessary costs for huge amount of small files | `bool` | `true` | no |
 | <a name="input_enabled"></a> [enabled](#input\_enabled) | Set to false to prevent the module from creating any resources | `bool` | `null` | no |
-| <a name="input_environment"></a> [environment](#input\_environment) | Environment, e.g. 'uw2', 'us-west-2', OR 'prod', 'staging', 'dev', 'UAT' | `string` | `null` | no |
+| <a name="input_environment"></a> [environment](#input\_environment) | ID element. Usually used for region e.g. 'uw2', 'us-west-2', OR role 'prod', 'staging', 'dev', 'UAT' | `string` | `null` | no |
 | <a name="input_expiration_days"></a> [expiration\_days](#input\_expiration\_days) | Number of days after which to expunge the objects | `number` | `90` | no |
 | <a name="input_force_destroy"></a> [force\_destroy](#input\_force\_destroy) | (Optional, Default:false ) A boolean that indicates all objects should be deleted from the bucket so that the bucket can be destroyed without error. These objects are not recoverable | `bool` | `false` | no |
 | <a name="input_glacier_transition_days"></a> [glacier\_transition\_days](#input\_glacier\_transition\_days) | Number of days after which to move the data to the glacier storage tier | `number` | `60` | no |
-| <a name="input_id_length_limit"></a> [id\_length\_limit](#input\_id\_length\_limit) | Limit `id` to this many characters (minimum 6).<br>Set to `0` for unlimited length.<br>Set to `null` for default, which is `0`.<br>Does not affect `id_full`. | `number` | `null` | no |
+| <a name="input_id_length_limit"></a> [id\_length\_limit](#input\_id\_length\_limit) | Limit `id` to this many characters (minimum 6).<br>Set to `0` for unlimited length.<br>Set to `null` for keep the existing setting, which defaults to `0`.<br>Does not affect `id_full`. | `number` | `null` | no |
 | <a name="input_kms_master_key_arn"></a> [kms\_master\_key\_arn](#input\_kms\_master\_key\_arn) | The AWS KMS master key ARN used for the SSE-KMS encryption. This can only be used when you set the value of sse\_algorithm as aws:kms. The default aws/s3 AWS KMS master key is used if this element is absent while the sse\_algorithm is aws:kms | `string` | `""` | no |
-| <a name="input_label_key_case"></a> [label\_key\_case](#input\_label\_key\_case) | The letter case of label keys (`tag` names) (i.e. `name`, `namespace`, `environment`, `stage`, `attributes`) to use in `tags`.<br>Possible values: `lower`, `title`, `upper`.<br>Default value: `title`. | `string` | `null` | no |
-| <a name="input_label_order"></a> [label\_order](#input\_label\_order) | The naming order of the id output and Name tag.<br>Defaults to ["namespace", "environment", "stage", "name", "attributes"].<br>You can omit any of the 5 elements, but at least one must be present. | `list(string)` | `null` | no |
-| <a name="input_label_value_case"></a> [label\_value\_case](#input\_label\_value\_case) | The letter case of output label values (also used in `tags` and `id`).<br>Possible values: `lower`, `title`, `upper` and `none` (no transformation).<br>Default value: `lower`. | `string` | `null` | no |
+| <a name="input_label_key_case"></a> [label\_key\_case](#input\_label\_key\_case) | Controls the letter case of the `tags` keys (label names) for tags generated by this module.<br>Does not affect keys of tags passed in via the `tags` input.<br>Possible values: `lower`, `title`, `upper`.<br>Default value: `title`. | `string` | `null` | no |
+| <a name="input_label_order"></a> [label\_order](#input\_label\_order) | The order in which the labels (ID elements) appear in the `id`.<br>Defaults to ["namespace", "environment", "stage", "name", "attributes"].<br>You can omit any of the 6 labels ("tenant" is the 6th), but at least one must be present. | `list(string)` | `null` | no |
+| <a name="input_label_value_case"></a> [label\_value\_case](#input\_label\_value\_case) | Controls the letter case of ID elements (labels) as included in `id`,<br>set as tag values, and output by this module individually.<br>Does not affect values of tags passed in via the `tags` input.<br>Possible values: `lower`, `title`, `upper` and `none` (no transformation).<br>Set this to `title` and set `delimiter` to `""` to yield Pascal Case IDs.<br>Default value: `lower`. | `string` | `null` | no |
+| <a name="input_labels_as_tags"></a> [labels\_as\_tags](#input\_labels\_as\_tags) | Set of labels (ID elements) to include as tags in the `tags` output.<br>Default is to include all labels.<br>Tags with empty values will not be included in the `tags` output.<br>Set to `[]` to suppress all generated tags.<br>**Notes:**<br>  The value of the `name` tag, if included, will be the `id`, not the `name`.<br>  Unlike other `null-label` inputs, the initial setting of `labels_as_tags` cannot be<br>  changed in later chained modules. Attempts to change it will be silently ignored. | `set(string)` | <pre>[<br>  "default"<br>]</pre> | no |
 | <a name="input_lifecycle_prefix"></a> [lifecycle\_prefix](#input\_lifecycle\_prefix) | Prefix filter. Used to manage object lifecycle events | `string` | `""` | no |
 | <a name="input_lifecycle_rule_enabled"></a> [lifecycle\_rule\_enabled](#input\_lifecycle\_rule\_enabled) | Enable lifecycle events on this bucket | `bool` | `true` | no |
 | <a name="input_lifecycle_tags"></a> [lifecycle\_tags](#input\_lifecycle\_tags) | Tags filter. Used to manage object lifecycle events | `map(string)` | `{}` | no |
-| <a name="input_name"></a> [name](#input\_name) | Solution name, e.g. 'app' or 'jenkins' | `string` | `null` | no |
-| <a name="input_namespace"></a> [namespace](#input\_namespace) | Namespace, which could be your organization name or abbreviation, e.g. 'eg' or 'cp' | `string` | `null` | no |
+| <a name="input_name"></a> [name](#input\_name) | ID element. Usually the component or solution name, e.g. 'app' or 'jenkins'.<br>This is the only ID element not also included as a `tag`.<br>The "name" tag is set to the full `id` string. There is no tag with the value of the `name` input. | `string` | `null` | no |
+| <a name="input_namespace"></a> [namespace](#input\_namespace) | ID element. Usually an abbreviation of your organization name, e.g. 'eg' or 'cp', to help ensure generated IDs are globally unique | `string` | `null` | no |
 | <a name="input_noncurrent_version_expiration_days"></a> [noncurrent\_version\_expiration\_days](#input\_noncurrent\_version\_expiration\_days) | Specifies when noncurrent object versions expire | `number` | `90` | no |
 | <a name="input_noncurrent_version_transition_days"></a> [noncurrent\_version\_transition\_days](#input\_noncurrent\_version\_transition\_days) | Specifies when noncurrent object versions transitions | `number` | `30` | no |
 | <a name="input_policy"></a> [policy](#input\_policy) | A valid bucket policy JSON document. Note that if the policy document is not specific enough (but still valid), Terraform may view the policy as constantly changing in a terraform plan. In this case, please make sure you use the verbose/specific version of the policy | `string` | `""` | no |
-| <a name="input_regex_replace_chars"></a> [regex\_replace\_chars](#input\_regex\_replace\_chars) | Regex to replace chars with empty string in `namespace`, `environment`, `stage` and `name`.<br>If not set, `"/[^a-zA-Z0-9-]/"` is used to remove all characters other than hyphens, letters and digits. | `string` | `null` | no |
+| <a name="input_regex_replace_chars"></a> [regex\_replace\_chars](#input\_regex\_replace\_chars) | Terraform regular expression (regex) string.<br>Characters matching the regex will be removed from the ID elements.<br>If not set, `"/[^a-zA-Z0-9-]/"` is used to remove all characters other than hyphens, letters and digits. | `string` | `null` | no |
 | <a name="input_sse_algorithm"></a> [sse\_algorithm](#input\_sse\_algorithm) | The server-side encryption algorithm to use. Valid values are AES256 and aws:kms | `string` | `"AES256"` | no |
-| <a name="input_stage"></a> [stage](#input\_stage) | Stage, e.g. 'prod', 'staging', 'dev', OR 'source', 'build', 'test', 'deploy', 'release' | `string` | `null` | no |
+| <a name="input_stage"></a> [stage](#input\_stage) | ID element. Usually used to indicate role, e.g. 'prod', 'staging', 'source', 'build', 'test', 'deploy', 'release' | `string` | `null` | no |
 | <a name="input_standard_transition_days"></a> [standard\_transition\_days](#input\_standard\_transition\_days) | Number of days to persist in the standard storage tier before moving to the infrequent access tier | `number` | `30` | no |
-| <a name="input_tags"></a> [tags](#input\_tags) | Additional tags (e.g. `map('BusinessUnit','XYZ')` | `map(string)` | `{}` | no |
+| <a name="input_tags"></a> [tags](#input\_tags) | Additional tags (e.g. `{'BusinessUnit': 'XYZ'}`).<br>Neither the tag keys nor the tag values will be modified by this module. | `map(string)` | `{}` | no |
+| <a name="input_tenant"></a> [tenant](#input\_tenant) | ID element \_(Rarely used, not included by default)\_. A customer identifier, indicating who this instance of a resource is for | `string` | `null` | no |
 
 ## Outputs
 
diff --git a/examples/complete/context.tf b/examples/complete/context.tf
index 81f99b4..5e0ef88 100644
--- a/examples/complete/context.tf
+++ b/examples/complete/context.tf
@@ -8,6 +8,8 @@
 # Cloud Posse's standard configuration inputs suitable for passing
 # to Cloud Posse modules.
 #
+# curl -sL https://raw.githubusercontent.com/cloudposse/terraform-null-label/master/exports/context.tf -o context.tf
+#
 # Modules should access the whole context as `module.this.context`
 # to get the input variables with nulls for defaults,
 # for example `context = module.this.context`,
@@ -20,10 +22,11 @@
 
 module "this" {
   source  = "cloudposse/label/null"
-  version = "0.24.1" # requires Terraform >= 0.13.0
+  version = "0.25.0" # requires Terraform >= 0.13.0
 
   enabled             = var.enabled
   namespace           = var.namespace
+  tenant              = var.tenant
   environment         = var.environment
   stage               = var.stage
   name                = var.name
@@ -36,6 +39,8 @@ module "this" {
   id_length_limit     = var.id_length_limit
   label_key_case      = var.label_key_case
   label_value_case    = var.label_value_case
+  descriptor_formats  = var.descriptor_formats
+  labels_as_tags      = var.labels_as_tags
 
   context = var.context
 }
@@ -47,6 +52,7 @@ variable "context" {
   default = {
     enabled             = true
     namespace           = null
+    tenant              = null
     environment         = null
     stage               = null
     name                = null
@@ -59,6 +65,15 @@ variable "context" {
     id_length_limit     = null
     label_key_case      = null
     label_value_case    = null
+    descriptor_formats  = {}
+    # Note: we have to use [] instead of null for unset lists due to
+    # https://github.com/hashicorp/terraform/issues/28137
+    # which was not fixed until Terraform 1.0.0,
+    # but we want the default to be all the labels in `label_order`
+    # and we want users to be able to prevent all tag generation
+    # by setting `labels_as_tags` to `[]`, so we need
+    # a different sentinel to indicate "default"
+    labels_as_tags = ["unset"]
   }
   description = <<-EOT
     Single object for setting entire context at once.
@@ -88,32 +103,42 @@ variable "enabled" {
 variable "namespace" {
   type        = string
   default     = null
-  description = "Namespace, which could be your organization name or abbreviation, e.g. 'eg' or 'cp'"
+  description = "ID element. Usually an abbreviation of your organization name, e.g. 'eg' or 'cp', to help ensure generated IDs are globally unique"
+}
+
+variable "tenant" {
+  type        = string
+  default     = null
+  description = "ID element _(Rarely used, not included by default)_. A customer identifier, indicating who this instance of a resource is for"
 }
 
 variable "environment" {
   type        = string
   default     = null
-  description = "Environment, e.g. 'uw2', 'us-west-2', OR 'prod', 'staging', 'dev', 'UAT'"
+  description = "ID element. Usually used for region e.g. 'uw2', 'us-west-2', OR role 'prod', 'staging', 'dev', 'UAT'"
 }
 
 variable "stage" {
   type        = string
   default     = null
-  description = "Stage, e.g. 'prod', 'staging', 'dev', OR 'source', 'build', 'test', 'deploy', 'release'"
+  description = "ID element. Usually used to indicate role, e.g. 'prod', 'staging', 'source', 'build', 'test', 'deploy', 'release'"
 }
 
 variable "name" {
   type        = string
   default     = null
-  description = "Solution name, e.g. 'app' or 'jenkins'"
+  description = <<-EOT
+    ID element. Usually the component or solution name, e.g. 'app' or 'jenkins'.
+    This is the only ID element not also included as a `tag`.
+    The "name" tag is set to the full `id` string. There is no tag with the value of the `name` input.
+    EOT
 }
 
 variable "delimiter" {
   type        = string
   default     = null
   description = <<-EOT
-    Delimiter to be used between `namespace`, `environment`, `stage`, `name` and `attributes`.
+    Delimiter to be used between ID elements.
     Defaults to `-` (hyphen). Set to `""` to use no delimiter at all.
   EOT
 }
@@ -121,36 +146,64 @@ variable "delimiter" {
 variable "attributes" {
   type        = list(string)
   default     = []
-  description = "Additional attributes (e.g. `1`)"
+  description = <<-EOT
+    ID element. Additional attributes (e.g. `workers` or `cluster`) to add to `id`,
+    in the order they appear in the list. New attributes are appended to the
+    end of the list. The elements of the list are joined by the `delimiter`
+    and treated as a single ID element.
+    EOT
+}
+
+variable "labels_as_tags" {
+  type        = set(string)
+  default     = ["default"]
+  description = <<-EOT
+    Set of labels (ID elements) to include as tags in the `tags` output.
+    Default is to include all labels.
+    Tags with empty values will not be included in the `tags` output.
+    Set to `[]` to suppress all generated tags.
+    **Notes:**
+      The value of the `name` tag, if included, will be the `id`, not the `name`.
+      Unlike other `null-label` inputs, the initial setting of `labels_as_tags` cannot be
+      changed in later chained modules. Attempts to change it will be silently ignored.
+    EOT
 }
 
 variable "tags" {
   type        = map(string)
   default     = {}
-  description = "Additional tags (e.g. `map('BusinessUnit','XYZ')`"
+  description = <<-EOT
+    Additional tags (e.g. `{'BusinessUnit': 'XYZ'}`).
+    Neither the tag keys nor the tag values will be modified by this module.
+    EOT
 }
 
 variable "additional_tag_map" {
   type        = map(string)
   default     = {}
-  description = "Additional tags for appending to tags_as_list_of_maps. Not added to `tags`."
+  description = <<-EOT
+    Additional key-value pairs to add to each map in `tags_as_list_of_maps`. Not added to `tags` or `id`.
+    This is for some rare cases where resources want additional configuration of tags
+    and therefore take a list of maps with tag key, value, and additional configuration.
+    EOT
 }
 
 variable "label_order" {
   type        = list(string)
   default     = null
   description = <<-EOT
-    The naming order of the id output and Name tag.
+    The order in which the labels (ID elements) appear in the `id`.
     Defaults to ["namespace", "environment", "stage", "name", "attributes"].
-    You can omit any of the 5 elements, but at least one must be present.
-  EOT
+    You can omit any of the 6 labels ("tenant" is the 6th), but at least one must be present.
+    EOT
 }
 
 variable "regex_replace_chars" {
   type        = string
   default     = null
   description = <<-EOT
-    Regex to replace chars with empty string in `namespace`, `environment`, `stage` and `name`.
+    Terraform regular expression (regex) string.
+    Characters matching the regex will be removed from the ID elements.
     If not set, `"/[^a-zA-Z0-9-]/"` is used to remove all characters other than hyphens, letters and digits.
   EOT
 }
@@ -161,7 +214,7 @@ variable "id_length_limit" {
   description = <<-EOT
     Limit `id` to this many characters (minimum 6).
     Set to `0` for unlimited length.
-    Set to `null` for default, which is `0`.
+    Set to `null` for keep the existing setting, which defaults to `0`.
     Does not affect `id_full`.
   EOT
   validation {
@@ -174,7 +227,8 @@ variable "label_key_case" {
   type        = string
   default     = null
   description = <<-EOT
-    The letter case of label keys (`tag` names) (i.e. `name`, `namespace`, `environment`, `stage`, `attributes`) to use in `tags`.
+    Controls the letter case of the `tags` keys (label names) for tags generated by this module.
+    Does not affect keys of tags passed in via the `tags` input.
     Possible values: `lower`, `title`, `upper`.
     Default value: `title`.
   EOT
@@ -189,8 +243,11 @@ variable "label_value_case" {
   type        = string
   default     = null
   description = <<-EOT
-    The letter case of output label values (also used in `tags` and `id`).
+    Controls the letter case of ID elements (labels) as included in `id`,
+    set as tag values, and output by this module individually.
+    Does not affect values of tags passed in via the `tags` input.
     Possible values: `lower`, `title`, `upper` and `none` (no transformation).
+    Set this to `title` and set `delimiter` to `""` to yield Pascal Case IDs.
     Default value: `lower`.
   EOT
 
@@ -199,4 +256,24 @@ variable "label_value_case" {
     error_message = "Allowed values: `lower`, `title`, `upper`, `none`."
   }
 }
+
+variable "descriptor_formats" {
+  type        = any
+  default     = {}
+  description = <<-EOT
+    Describe additional descriptors to be output in the `descriptors` output map.
+    Map of maps. Keys are names of descriptors. Values are maps of the form
+    `{
+       format = string
+       labels = list(string)
+    }`
+    (Type is `any` so the map values can later be enhanced to provide additional options.)
+    `format` is a Terraform format string to be passed to the `format()` function.
+    `labels` is a list of labels, in order, to pass to `format()` function.
+    Label values will be normalized before being passed to `format()` so they will be
+    identical to how they appear in `id`.
+    Default is `{}` (`descriptors` output will be empty).
+    EOT
+}
+
 #### End of copy of cloudposse/terraform-null-label/variables.tf