PublishPersistentData in HTML5 Canvas documents


I would like to use the setPublishPersistentData API in an extension I am developing for html5 canvas documents. In the documentation it states that ‘EMBED_SWF’ is the built-in publishing format, however this documentation is rather old (I wasn’t able to find anything more recent)… is there a different publishing format string to use for HTML5 canvas documents? If not, is there any other way to get custom data (just a few strings) from an extension to embed into the published output?

Please help.

I did not find the right solution from the internet.

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