No EntitySetPath => context URL

Author: HeikoTheissen

docs/odata-csdl-json/odata-csdl-json.html

@@ -1956,6 +1956,7 @@ <h3><a id="IsBound.13.1" href="#IsBound.13.1"><code>$IsBound</code></a></h3>
 <h2 id="126-entity-set-path"><a id="EntitySetPath" href="#EntitySetPath">12.6 Entity Set Path</a></h2>
 </summary>
 <p>Bound actions and functions that return an entity or a collection of entities MAY specify an entity set path. The entity set path specifies the canonical collection (as defined in <a href="https://docs.oasis-open.org/odata/odata/v4.02/odata-v4.02-part1-protocol.html#ContextURL">OData-Protocol, section 10</a>) of the returned entities in terms of the binding parameter value.</p>
+<p>If no entity set path is specified or the canonical collection cannot be determined by the following rules, the service SHOULD include a context URL <a href="https://docs.oasis-open.org/odata/odata/v4.02/odata-v4.02-part1-protocol.html#ContextURL">OData-Protocol, section 10</a> in the response.</p>
 <p>The entity set path consists of a series of segments joined together with forward slashes. The first segment of the entity set path MUST be the name of the binding parameter. If the entity set path consists only of the name of the binding parameter, the binding parameter MUST be an entity or a collection of entities. In this case the returned entities MUST belong to the same canonical collection as the binding parameter.</p>
 <p>Otherwise the entity set path has the form <span class="math inline">\(p/s_1/…/s_k\)</span> with <span class="math inline">\(k&gt;0\)</span>, and the binding parameter MUST be single-valued. The additional segments <span class="math inline">\(s_1,…,s_k\)</span> MUST be paths that could occur in an expand item <a href="https://docs.oasis-open.org/odata/odata/v4.02/odata-v4.02-part2-url-conventions.html#SystemQueryOptionexpand">OData-URL, section 5.1.3</a>, and they MUST end with the name of a <a href="#NavigationProperty">navigation property</a>, optionally followed by the <a href="#QualifiedName">qualified name</a> of a type cast. Furthermore, <span class="math inline">\(s_1,…,s_{k-1}\)</span> MUST be single-valued, and <span class="math inline">\(s_k\)</span> MUST name a collection-valued navigation property. In this case all returned entities MUST belong to the canonical collection <span class="math inline">\(C\)</span> of the final navigation property, if this can be determined by the following algorithm:</p>
 <ol type="1">

docs/odata-csdl-json/odata-csdl-json.md

@@ -2819,6 +2819,9 @@ entities MAY specify an entity set path. The entity set path specifies the canon
 (as defined in [OData-Protocol, section 10](https://docs.oasis-open.org/odata/odata/v4.02/odata-v4.02-part1-protocol.html#ContextURL)) of the
 returned entities in terms of the binding parameter value.
 
+If no entity set path is specified or the canonical collection cannot be determined
+by the following rules, the service SHOULD include a context URL [OData-Protocol, section 10](https://docs.oasis-open.org/odata/odata/v4.02/odata-v4.02-part1-protocol.html#ContextURL) in the response.
+
 The entity set path consists of a series of segments joined together
 with forward slashes.
 The first segment of the entity set path MUST be the name of the binding

docs/odata-csdl-xml/odata-csdl-xml.html

@@ -1843,6 +1843,7 @@ <h3><a id="AttributeIsBound.21.2" href="#AttributeIsBound.21.2">Attribute <code>
 <h2 id="126-entity-set-path"><a id="EntitySetPath" href="#EntitySetPath">12.6 Entity Set Path</a></h2>
 </summary>
 <p>Bound actions and functions that return an entity or a collection of entities MAY specify an entity set path. The entity set path specifies the canonical collection (as defined in <a href="https://docs.oasis-open.org/odata/odata/v4.02/odata-v4.02-part1-protocol.html#ContextURL">OData-Protocol, section 10</a>) of the returned entities in terms of the binding parameter value.</p>
+<p>If no entity set path is specified or the canonical collection cannot be determined by the following rules, the service SHOULD include a context URL <a href="https://docs.oasis-open.org/odata/odata/v4.02/odata-v4.02-part1-protocol.html#ContextURL">OData-Protocol, section 10</a> in the response.</p>
 <p>The entity set path consists of a series of segments joined together with forward slashes. The first segment of the entity set path MUST be the name of the binding parameter. If the entity set path consists only of the name of the binding parameter, the binding parameter MUST be an entity or a collection of entities. In this case the returned entities MUST belong to the same canonical collection as the binding parameter.</p>
 <p>Otherwise the entity set path has the form <span class="math inline">\(p/s_1/…/s_k\)</span> with <span class="math inline">\(k&gt;0\)</span>, and the binding parameter MUST be single-valued. The additional segments <span class="math inline">\(s_1,…,s_k\)</span> MUST be paths that could occur in an expand item <a href="https://docs.oasis-open.org/odata/odata/v4.02/odata-v4.02-part2-url-conventions.html#SystemQueryOptionexpand">OData-URL, section 5.1.3</a>, and they MUST end with the name of a <a href="#NavigationProperty">navigation property</a>, optionally followed by the <a href="#QualifiedName">qualified name</a> of a type cast. Furthermore, <span class="math inline">\(s_1,…,s_{k-1}\)</span> MUST be single-valued, and <span class="math inline">\(s_k\)</span> MUST name a collection-valued navigation property. In this case all returned entities MUST belong to the canonical collection <span class="math inline">\(C\)</span> of the final navigation property, if this can be determined by the following algorithm:</p>
 <ol type="1">

docs/odata-csdl-xml/odata-csdl-xml.md

@@ -2698,6 +2698,9 @@ entities MAY specify an entity set path. The entity set path specifies the canon
 (as defined in [OData-Protocol, section 10](https://docs.oasis-open.org/odata/odata/v4.02/odata-v4.02-part1-protocol.html#ContextURL)) of the
 returned entities in terms of the binding parameter value.
 
+If no entity set path is specified or the canonical collection cannot be determined
+by the following rules, the service SHOULD include a context URL [OData-Protocol, section 10](https://docs.oasis-open.org/odata/odata/v4.02/odata-v4.02-part1-protocol.html#ContextURL) in the response.
+
 The entity set path consists of a series of segments joined together
 with forward slashes.
 The first segment of the entity set path MUST be the name of the binding

odata-csdl/12 Action and Function.md

@@ -186,6 +186,9 @@ entities MAY specify an entity set path. The entity set path specifies the canon
 (as defined in [#OData-Protocol#ContextURL]) of the
 returned entities in terms of the binding parameter value.
 
+If no entity set path is specified or the canonical collection cannot be determined
+by the following rules, the service SHOULD include a context URL [#OData-Protocol#ContextURL] in the response.
+
 The entity set path consists of a series of segments joined together
 with forward slashes.
 The first segment of the entity set path MUST be the name of the binding