You can view the HTML source of rendered itemView and propertyView JSP fragments. By doing so, you can determine which item mappings were used to render the asset. For example:

Mapping Information --------------------
description: Default Editable ItemMapping for Repository Items
itemPath: /atg/devtest/SecuredTestRepository
itemName: descriptor1
view: DefaultRepEdit, context root: /PubPortlets URI:

For each rendered standard property, the HTML source includes comments that wrap the property. For example:

<!-- Begin JSP, context root /PubPortlets, URI
/html/views/property/enumerated/radioGroupEdit.jsp -->
<!-- End JSP, context root /PubPortlets, URI
/html/views/property/enumerated/radioGroupEdit.jsp -->

Note: Custom property views should follow this convention, but are not required to do so.