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Modifying the HTML Client Item Selection Page
To enable recognition of custom parts as a sub-class of WTPart and not just the supported type in the HTML client item selection page’s default implementation, you must add support for the custom part in the configured wt.query.SearchAttributeListDelegate.
In addition, you must modify the CAD application HTML files that use the item selection page, and use the xconfmanager modify or override the type list id entries in com\ptc\windchill\cadx\propfiles\picker.properties.
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For wt.query.SearchAttributeList, which is the default configured search attribute list, the type identifier is referred to as the query value.