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Assuming the namespace for your custom model is 'htckm' and the property on the custom aspect is called 'subscribeUsers' then the third call is correct: document.properties["htckm:subscribeUsers"] I assume you have checked that the document has the aspect applied? You can use the document.hasAspect("htckm:myaspectname") call as appropriate.The value will be null if the property does not exist or has no value.Thanks,Kevin