Is there an IDEA 12.x analog to xml.tagNameProvider?

My custom language plugin includes support for extended markup in HTML(-like) files.  I've managed to provide completion and validation support for these tags using a combination of xml.tagNameProvider and xml.fileNSInfoProvider, but when I try to compile the plugin for IDEA 12, the former isn't a recognized extension point.  So far I've managed to find an analogous extension point for everything I've implemented even if it's more limited in capability.  Is there an IDEA 12 analog for xml.tagNameProvider?

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