Here's a
presentation containing an overview of the flat file parser annotations that can be manually inserted into the BizTalk message schema. This is part of a presentation I gave at the Belgian BTS user group meeting a couple of weeks ago. There is also a
sample project containing different schemas per annotation showing each annotation's purpose. My main source of information was the BizTalk newsgroups where David Downing makes the beautiful weather for this topic. Just for the record: as usual everything is 'AS IS', so there's no warranty at all...