What is the purpose of the <attr ... > ... </attr> tags I now see in the source code for the "grid_" and "pov_" properties of the GAME and OBJECT elements? It does not seem to be documented.

It's an alternative syntax for storing attributes, and is used when the attribute name itself would be invalid XML. For example, if an attribute name has a space, then <my attribute>value</my attribute> is not valid XML so Quest stores it using an attr tag instead.

If this is happening for underscores then that's a minor bug I've introduced in v5.4 - underscores are valid, so using attr isn't necessary here. But that said, it's not breaking anything at least!

I understand - just curious. Thanks for the quick replay.