No duplicate nested query options

docs/odata-url-conventions/odata-url-conventions.html

@@ -2259,7 +2259,7 @@ <h3 id="513-system-query-option-expand"><a id="SystemQueryOptionexpand" href="#S
 <pre><code>http://host/service/Customers?$expand=Addresses/Country</code></pre>
 </div>
 <p>A path MUST NOT appear in more than one expand item.</p>
-<p>Query options can be applied to an expanded navigation property by appending a semicolon-separated list of query options, enclosed in parentheses, to the navigation property name. Allowed system query options are <a href="#SystemQueryOptioncompute"><code>$compute</code></a>, <a href="#SystemQueryOptionselect"><code>$select</code></a>, <code>$expand</code>, and <a href="#ExpandOptionlevels"><code>$levels</code></a> for all navigation properties, plus <a href="#SystemQueryOptionfilter"><code>$filter</code></a>, <a href="#SystemQueryOptionorderby"><code>$orderby</code></a>, <a href="#SystemQueryOptionstopandskip"><code>$skip</code></a>, <a href="#SystemQueryOptionstopandskip"><code>$top</code></a>, <a href="#SystemQueryOptioncount"><code>$count</code></a>, and <a href="#SystemQueryOptionsearch"><code>$search</code></a> for collection-valued navigation properties.</p>
+<p>Query options can be applied to an expanded navigation property by appending a semicolon-separated list of query options, enclosed in parentheses, to the navigation property name. Allowed system query options are <a href="#SystemQueryOptioncompute"><code>$compute</code></a>, <a href="#SystemQueryOptionselect"><code>$select</code></a>, <code>$expand</code>, and <a href="#ExpandOptionlevels"><code>$levels</code></a> for all navigation properties, plus <a href="#SystemQueryOptionfilter"><code>$filter</code></a>, <a href="#SystemQueryOptionorderby"><code>$orderby</code></a>, <a href="#SystemQueryOptionstopandskip"><code>$skip</code></a>, <a href="#SystemQueryOptionstopandskip"><code>$top</code></a>, <a href="#SystemQueryOptioncount"><code>$count</code></a>, and <a href="#SystemQueryOptionsearch"><code>$search</code></a> for collection-valued navigation properties. The same system query option, irrespective of casing or whether or not it is prefixed with a <code>$</code>, MUST NOT be specified more than once for a collection-valued navigation property.</p>
 <div class="example">
 <p>Example 124: all categories and for each category all related products with a discontinued date equal to <code>null</code></p>
 <pre><code>http://host/service/Categories?$expand=Products($filter=DiscontinuedDate eq null)</code></pre>

docs/odata-url-conventions/odata-url-conventions.md

@@ -3634,6 +3634,8 @@ Allowed system query options are
 [`$count`](#SystemQueryOptioncount), and
 [`$search`](#SystemQueryOptionsearch)
 for collection-valued navigation properties.
+The same system query option, irrespective of casing or whether or not it is prefixed with a `$`,
+MUST NOT be specified more than once for a collection-valued navigation property.
 
 ::: example
 Example 124: all categories and for each category all related products

odata-url-conventions/5 Query Options.md

@@ -2061,6 +2061,8 @@ Allowed system query options are
 [`$count`](#SystemQueryOptioncount), and
 [`$search`](#SystemQueryOptionsearch)
 for collection-valued navigation properties.
+The same system query option, irrespective of casing or whether or not it is prefixed with a `$`,
+MUST NOT be specified more than once for a collection-valued navigation property.
 
 ::: example
 Example ##ex: all categories and for each category all related products