BaseBase - FrameSet base Frame index

Description:
This attribute gives the index of the FrameFrame which is to be regarded as the "base" Frame within a FrameSetFrameSet. The default is the first Frame added to the FrameSet when it is created (this Frame always has an index of 1).

When setting a new value for this attribute, a string may be supplied instead of an integer index. In this case a search is made within the FrameSet for a Frame that has its DomainDomain attribute value equal to the supplied string (the comparison is case-insensitive). If found, the Frame is made the base Frame. Otherwise an error is reported.

Type:
Integer.
Class Applicability:
FrameSet
All FrameSets have this attribute.
Notes:
  • Inverting a FrameSet (inverting the boolean sense of its InvertInvert attribute, with the astInvertastInvert function for example) will interchange the values of its Base and CurrentCurrent attributes.