Supporting WTPart and Custom Part
If your site plans to use both Parts and custom parts, use the following procedure.
1. Add custom part support to HTML Search.
2. To add the custom part type identifier created in Step 1, use the custom.site.xconf file and add the type list entries in picker.properties that contain a type identifier for Part.
3. To add an All type list entry for a type list, add an entry with the ALL type identifier used by the configured search attribute list.