can solr follow and index hyperlinks embedded in rich text documents (pdf, doc, etc)?

[Tod]

I have a feeling the answer is "no" since you wouldn't want to start 
indexing a large volume of office documents containing hyperlinks that 
could lead all over the internet.  But, since there might be a use case 
like "a customer just asked me if it could be done?", I thought I would 
make sure.

Thanks - Tod