Significance of O_ and H_ markers?

All,

I converted content from Word to FrameMaker by copying from Word and pasting into Frame, then applying a Frame template and if needed, 'manually' applying styles. When I open the resulting Frame file and view the Markers pod, there are a lot of markers that start with O_ or H_ followed by a number. They are all of type "Cross-Ref," some appear at the end of a term, and others appear at the beginning. Generating a PDF of the Frame file, I see that these cross-references don't actually work.

I'm assuming that:

• Frame automatically assigned these marker IDs when it saw a cross-reference in the copied content from Word.
• Frame randomly generated the marker numbers to create unique IDs
• These cross-references might work if I could provide Frame with some piece of information it is missing.

My questions:

1) Does anyone know what, if any, significance the letter (O_ or H_) has?  Is it randomly generated or does it actually mean something?  The Frame documentation I have makes no reference to O_ or H_ markers. Any thoughts are most appreciated! (Or pointers to existing docs that discuss this.)

2) Aside from deleting and re-doing all these cross-refs in Frame, is there something I can do to get these cross-refs to work?

Thanks for any help!

Susan