This paper covers Poser's dependency system it's also sometimes referred to as Extended Motion Control, EMC or Extended Remote Control pr ERC. This is mostly for historical purposes and as a reference as to how dependencies are coded in the Poser format. New versions of Poser have a built in tool for editing dependencies making hand editing something that's reserved for only the most complex dependency setups.
For full whitepaper in PDF format, click here: Poser_Dependencies.pdf