For information on converting to InterSystems IRIS, see the
InterSystems IRIS Adoption Guide
and the InterSystems IRIS In-Place Conversion Guide,
both available on the WRC Distributions page (login required).
A logical value determines if classnames of referenced properties are stored.
0 - store only the ID;
1 - store the two element form of the OID
2 - store the three element form of the OID (applies only to streams currently)