Comparing timestamps without timezone indication

[rorlic]

The TREE specification defines the behavior on how to interpret an xsd:dateTime without a timezone indication:

xsd:dateTime literals without a timezone comparisons MUST be performed by interpreting the xsd:dateTime literal as a period of time, with a min inclusive bound of -14:00 and max exclusive bound of +14:00.

I am assuming that this refers to the literal values that result from applying the tree:path (LHS). However, if both the LHS and the RHS are a xsd:dateTime without a timezone indication, this may become pretty complex for matching the constraint. E.g. :

• What is less-than? Is this period A is completely or partially before period B?
• How do you specify period containment?
• etc.

Maybe we should not allow the use of a xsd:dateTime without a timezone indication for tree:value and put that explicitly here?