General concepts of grammar and file-parsing

Hello,

I'm new to spirit and have the growing feeling that I'm missing some
key-points in understanding the architecture.

I wrote a (so far, working) grammar for xyz-files.
Now i'm stuck in integrating this with the actual file-handling.
I figured, the stream-interface would be preferable to the
iterator-interface as it's not only less verbose than phrase_parse, but
should work on both ifstreams and stringstreams.

But now i don't get it to accept my grammar (which has, in fact, a
mandatory iterator-argument), and am wondering if this is intentional...

So my main questions are:
Are the two interfaces even meant to be interchangeable?
Is there a different way to create and compose rules?
Or is it preferable to utilize a modified iterator as in
http://boost-spirit.com/home/2010/01/05/stream-based-parsing-made-easy/ ?
And - somewhat unrelated - is it possible to embed rules with a skipper
inside rules or a grammar without a skipper? Respectively, utilize skipping
rules inside the context of qi::parse?

Thank you for your help,
Sebastian

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