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.