🚀 go-pugleaf

First of all: I am just a user with a problem, not a nerd, so please don't tell me to RTFM.
If You can help me, please spell it out. Hopefully I can explain what my problem is in the following. And I am Danish, so I also need a little patience regarding my English.
I have already tried to find an answer in the userforums and manuals, without success so far.

I am the happy owner of Adobe Creative Suite Premium (trying to find the money needed for upgrading to CS2).

Here we go:
Is it possible generating an XML-file from a database for import to InDesign, that is, an XML-file containing XML-tags for styling and including Indesign index markers in specific XML-tags? And is it possible exporting similarly with changes to the database, still with the Indesign index markers intact, and then import once more?

As it is now, import/export with XML-tags and styling in InDesign works very well. No problem in that area. It is the Indesign index markers I can't figure out. So far I am aware that some scripting will be involved, but I really need some help figuring that out.

Example:

<fo>Forfatter:</fo> <fonavn>John Johnson</fonavn>
<me>Medvirkende:</me> <menavn>Mark Smith</menavn>, <menavn>Julie Hanson</menavn>

The <fo>-tag and the <me>-tag is just for styling. No index marker needed.
The <fonavn>-tag and the <menavn>-tag are for styling and if possible attached an index marker when generated to an xml-file from the database.
The <fonavn>-tag and the <menavn>-tag appears several times, but with a different name each time. Also the index marker should list lastname first, that is "Johnson, John" and so forth.
The <fonavn>-tag and the <menavn>-tag are not the only tags to be indexed. There are seven different tags to index, each consisting of several different names.

How can I make that happen?

I hope some of You out there can help me.
For ever grateful!
And I am sorry if this topic is a "oh no, not again"-topic.

beebee-denmark