First batch of annotations on what we have already or desire

doc/design/paths-endpoint-webdav.md

@@ -6,16 +6,16 @@ Submitted as a PR to avoid spagetti thread discussion on https://github.com/dand
 @jwodder listed needed properties and metadata fields:
 
 * Asset properties used by dandidav:
-    * `asset_id`
+    * `asset_id` (PRESENT)
     * `blob_id`
     * `zarr_id`
     * `path`
-    * `size`
-    * `created`
-    * `modified`
+    * `size`  (PRESENT)
+    * `created` (GOOD TO HAVE)
+    * `modified` (SUGGESTED to be included)
         * Note: It might be more accurate to use the `blobDateModified` metadata field for this instead; cf. dandi/dandidav#17
 
 * Asset metadata used by dandidav:
-    * `encodingFormat` (blobs only)
-    * `contentUrl` (API download URL for blobs, S3 URL for Zarrs)
+    * `encodingFormat` (blobs only) (STRONGLY DESIRED but not REQUIRED)
+    * `contentUrl` (API download URL for blobs, S3 URL for Zarrs) (INCLUDED)
     * `digest["dandi:dandi-etag"]` (blobs only)