Fixed: Clarify path separators used in the inventory

Fixes #219

draft/spec/index.html

@@ -485,6 +485,11 @@ <h2>Inventory</h2>
             <code>inventory.json</code>. The order of entries in both the [[JSON]] objects and arrays used in inventory
             files has no significance.
         </p>
+        <p>
+            The forward slash (/) path separator MUST be used in existing and logical file paths in the manifest,
+            fixity, and state blocks within the inventory. Implementations that target systems using other separators
+            will need to translate paths appropriately.
+        </p>
         <blockquote class="informative">
             <p>
                 Non-normative note: A [[JSON-Schema]] for validating OCFL Object Inventory files is provided at