MDL reference

Is there an MDL reference somewhere where all objects in the file are explained. Some are obvious, but others (like geosets and helpers) are harder to understand. Also, is MDL a Blizzard invention or is it a "standardized" format?

A geoset is a group of polygons. They form things that move separately from each other. Like an axe that you need to have fall our of a grunt's hand during the death animation.

A helper (I think), is a rather nondescript point onto which one can attach particle emmiters or other things.

The posts stickied towards the top of this forum by me and cookie make a piecemeal reference to many parts of mdl syntax. You might want to search the forums for specific terms (it's practically a hidden feature, but there's a link to a search page at the very botton of all pages on this site). Failing that, post a question here, and it'll probably get answered - there's a number of people that know even the exotic stuff (not neccessarily me though :) ).

As Oinkerwinkle said, a geoset is the actual "model" part of the mdl file with polygons and bone attachments defined.

Bones are used with animation, to make geosets move, scale or rotate.

Helpers are similar to bones, but can be arbitrarily placed in a model.

THe longer you work at this, the better the feel you get for what's what.