diff --git a/_includes/format-entry.md b/_includes/format-entry.md
index 016dedc065..1bea284e40 100644
--- a/_includes/format-entry.md
+++ b/_includes/format-entry.md
@@ -2,7 +2,7 @@
 
 ## {{ page.slug }} - {{ page.description }}
 
-Base type: `{{ page.base_type | join:', ' }}`.
+JSON Data Type: `{{ page.base_type | join:', ' }}`.
 
 {{ include.summary }}
 
diff --git a/registries/_format/double-int.md b/registries/_format/double-int.md
index 87a821f708..50aa14ae8c 100644
--- a/registries/_format/double-int.md
+++ b/registries/_format/double-int.md
@@ -2,7 +2,7 @@
 owner: mikekistler
 issue: 
 description: an integer that can be stored in an IEEE 754 double-precision number without loss of precision
-base_type: integer
+base_type: number
 layout: default
 ---
 
diff --git a/registries/_format/sf-integer.md b/registries/_format/sf-integer.md
index 8edc872cee..17f5224fca 100644
--- a/registries/_format/sf-integer.md
+++ b/registries/_format/sf-integer.md
@@ -4,7 +4,7 @@ issue:
 description: structured fields integer as defined in [RFC8941]
 source: https://www.rfc-editor.org/rfc/rfc8941#name-integers
 source_label: RFC 8941
-base_type: [integer, number]
+base_type: number
 layout: default
 ---
 
diff --git a/registry/format.md b/registry/format.md
index c032f95844..90e1e1341f 100644
--- a/registry/format.md
+++ b/registry/format.md
@@ -15,14 +15,15 @@ If tools choose to implement any format present in this registry, they SHOULD im
 
 The registry SHOULD NOT contain two entries that have the same meaning, unless all but one have been deprecated.
 
-
 ## Contributing
 
 Please raise a [Pull-Request](https://github.com/OAI/OpenAPI-Specification/pulls) or [Issue](https://github.com/OAI/OpenAPI-Specification/issues) to contribute or discuss a registry value.
 
 ## Values
 
-|Value|Description|Type|Source|Deprecated|
+For the purpose of [JSON Schema validation](https://datatracker.ietf.org/doc/html/draft-bhutton-json-schema-validation-00#section-7.1), each format should specify the set of JSON data types for which it applies. In this registry, these types are shown in the "JSON data type" column.
+
+|Value|Description|JSON Data Type|Source|Deprecated|
 |---|---|----|---|---|----|
 {% for value in site.format %}| <a href="./{{ value.slug }}.html">{{ value.slug }}</a> | {{ value.description }} | {{ value.base_type | join: ', ' }} | {% if value.source %}<a href="{{ value.source }}">{% if value.source_label %}{{value.source_label}}{% else %}Open{% endif %}</a>{% endif %} | {% if value.deprecated_note %}Yes{% else %}No{% endif %} |
 {% endfor %}