The obiwan "tag" mode provides the ability to add custom "tags" to ORIGEN binary files. There are two types of "tags": identification tags and state tags. The identification tag is a string and is meant to identify a particular file or set of files. The state tag is meant to set the value of a real (stored in double precision) that should be used for interpolating multiple libraries to a new state not represented by any single library.

This is the help screen shown for "obiwan tag".