Message Header vs. Context Terminology

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Is anyone confused about the conflicting terminlogy I have seen in the BizTalk documentation regarding BizTalk message headers and contexts? I have always understood a message to be just a context and a body. There is no 'header' in a BizTalk message that has been received by an adapter. For instance, here is an exerpt from the product documenation and I have seen this terminlogy conflict in other whitepapers and documentation.

A message is made up of a header section and a body section:

· Headers are simple name-value pairs. The names are all drawn from various property schemas. The system provides some core schemas and BizTalk Server applications can add their own.

I believe this should read:

A message is made up of a context and a body:

· The context is composed of simple name-value pairs. The names are all drawn from various property schemas. The system provides some core schemas and BizTalk Server applications can add their own.