With schema v1.1, both dataTypes and propertyClasses may have an attribute 'multiple', where the propertyClass' supersedes the dataTypes'.
There is no real benefit in having both options. But it complicated the code of applications processing SpecIF. It is proposed to remove the attribute 'multiple' from dataTypes.
For SpecIF Schema v1.2 it has been proposed to mark this attribute as DEPRECATED. The same attribute shall be used with propertyClasses, instead. There is no effect on the power of expression.
With schema v1.1, both dataTypes and propertyClasses may have an attribute 'multiple', where the propertyClass' supersedes the dataTypes'.
There is no real benefit in having both options. But it complicated the code of applications processing SpecIF. It is proposed to remove the attribute 'multiple' from dataTypes.