Sorry. For some reason MSDN decided not to put tags inside the page. If you scroll down a few screensful, you will find the definition in a PDF and this abstract...
WS-Transfer defines how to invoke a simple set of familiar verbs (Get, Post, Put, and Delete) using SOAP. An application protocol may be constructed to perform these operations over resources.Why, yes, these verbs do seem familiar. This makes them easier to adopt into a brand new spec, I guess. But does that make them the right set of verbs?
These verbs are workable in HTTP. But are they desirable when starting over? Do they facilitate automated coordination of distributed, asynchronous resources as well as any other set of verbs?
This spec looks to me like the easy way out of the job of hypothesizing, discovering, and validating something potentially more useful. Curious HTTP is not listed in the references. Neither are any landmark writings in the history of coordination mechanisms.
Sigh. While this could be seen as a simplified path out of the deep, dark woods of the WS-xxx, instead it is a cheap short cut avoiding or at least lacking much evidence of deep thought. Typical for WS-xxx then.