Proofreading lyrics in vocal score esp. hypens and melismas

I am editing many vocal scores and I try to build a plugin to automate proofreading i.e.
1) Mark all notes/chords that have neither a lyrics syllable, a melisma or are hypenated between other syllables.
2) Check whether notes/chords that have melisma or hypenated lyrics are connected with ties or slurs.
I think I get all infomation for hyphens in lyrics by the syllabic property. ties and slurs are also accessible by plugin objects. But i couldn't find information how to detect melsimas via plugin or hwo I could create them from the plugin.
Any hints are appreciated.