Is set if: For the current root-element input variables exists.
Effect if set:
For the current root-element input variables are given (see section 21.2.5 on page ) and the offset, at which byte they start in the root-element.
If not set: For the current root-element no input variables exists.
Effect if not set:
No offset is given for the input variables in the current root-element and no input variables are given in the current root-element.