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The possible stampvalue tags can be found here DFS 9.23.0 - 3 Render DAM for Sitecore Field Types, section 3.5 and here DFS 9.3.0 - 4 Accessing metadata through API.
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The possible stampvalue tags can be found here DFS 9.23.0 - 3 Render DAM for Sitecore Field Types, section 3.5 and here DFS 9.3.0 - 4 Accessing metadata through API.
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