This technical corrigendum to ITU-T Rec. X.681 | ISO/IEC 8824-2:
a) clarifies what is meant by a "recursive definition" when information objects are being discussed;
b) changes the production for "ObjectSetSpec" so that it corresponds to the corrected definition of "ElementSetSpecs" in ITU-T Rec. X.680 | ISO/IEC 8824-1 Corrigendum 1;
c) clarifies the effect of the extension marker when used in defining information object sets;
d) clarifies that value sets that contain no values are invalid;
e) makes a few editorial corrections.