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+HTTP Definitions {#http-definitions}
+===================================
+
+## Link Relations ## {#link-relations}
+
+The intent is that these link relations will be registered with IANA per [[!RFC8288]]. 
+
+### acl ### {#acl}
+
+The contents of this section were originally taken from [Web Access Control](https://www.w3.org/wiki/WebAccessControl).
+
+The following Link Relationship will be submitted to IANA for review, approval, and inclusion in the IANA Link Relations registry.
+
+: Relation Name
+:: `acl`
+: Description
+:: The relationship `A acl B` asserts that resource B provides access control description of resource A. There are no constraints on the format or representation of either A or B, neither are there any further constraints on either resource.
+: Reference
+:: This specification.
+: Notes
+:: Consumers of ACL resources should be aware of the source and chain of custody of the data.
+
+[[Source](https://github.com/solid/specification/issues/54)]
+[[Source](https://github.com/solid/web-access-control-spec/issues/21)]
+
+Issue:
+Shape of ACL: https://github.com/solid/specification/issues/169
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diff --git a/main/index.bs b/main/index.bs
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@@ -28,6 +28,7 @@ any feedback, comments, or questions you might have.
 <pre class=include>path: resource-access.bs</pre>
 <pre class=include>path: clients.bs</pre>
 <pre class=include>path: optional.bs</pre>
+<pre class=include>path: http-definitions.bs</pre>
 <pre class=include>path: security.bs</pre>
 <pre class=include>path: conformance.bs</pre>