big tings

registry/schema-org/CompleteDataFeed.schema.json

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+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "$id": "schema:CompleteDataFeed",
+  "title": "CompleteDataFeed",
+  "description": "A [[CompleteDataFeed]] is a [[DataFeed]] whose standard representation includes content for every item currently in the feed.\n\nThis is the equivalent of Atom's element as defined in Feed Paging and Archiving [RFC 5005](https://tools.ietf.org/html/rfc5005), for example (and as defined for Atom), when using data from a feed that represents a collection of items that varies over time (e.g. \"Top Twenty Records\") there is no need to have newer entries mixed in alongside older, obsolete entries. By marking this feed as a CompleteDataFeed, old entries can be safely discarded when the feed is refreshed, since we can assume the feed has provided descriptions for all current items.",
+  "type": "object",
+  "allOf": [
+    {
+      "description": "A single feed providing structured information about one or more entities or topics.",
+      "$ref": "schema:DataFeed"
+    }
+  ]
+}