+Backend interface change. Individual Scan terms returned from
+bend_scan may also be tagged as Surrogate Diagnostics. Refer
+to struct scan_entry in include/backend.h.
+
+Retrieval module enhancements. Multiple tag sets and attribute sets
+may be specified in abstract syntax specs. Revised the error/warning
+logging messages reported by the retrieval module when reading the
+various spec files.
+
+Object Identifier system (oid_..) changed. The API is backwards
+compatible but the oid-routines now allocates new OID's
+when needed. Raw OID's may be specified in oid_getvalbyname.
+