ValueTag

[Vinayak Borkar <vb...@yahoo.com>]

Dear VXQuery-ers,


I have added a new class with constants called ValueTag that captures 
the tag values to use for all data types. This is a change from using 
BuiltinTypeConstants to represent the tags.

ValueTag reuses the constants from BuiltinTypeConstants for tags 
representing builtin types and it adds tag values for more datatypes 
such as sequences and the various types of nodes.

I have also changed all existing code to use ValueTag values where 
appropriate. Henceforth, please use ValueTag in new code to reference 
tag values for data.

Thanks,
Vinayak