+ \section z3950 Z39.50
+
+ Z39.50 common header: \ref proto.h .
+
+ Z39.50 core codecs: \ref z-core.h.
+
+ Z39.50 related formats:
+ \ref z-accdes1.h , \ref z-core.h ,
+ \ref z-estask.h , \ref z-oclcui.h , \ref z-sum.h
+ \ref z-accform1.h , \ref z-date.h ,
+ \ref z-exp.h , \ref z-opac.h , \ref z-sutrs.h
+ \ref z-acckrb1.h , \ref z-diag1.h ,
+ \ref z-grs.h , \ref z-rrf1.h , \ref z-uifr1.h
+ \ref z-charneg.h , \ref z-espec1.h
+ \ref z-mterm2.h , \ref z-rrf2.h , \ref z-univ.h .
+
+ Z39.50 extended services:
+ \ref zes-admin.h , \ref zes-exps.h , \ref zes-pquery.h ,
+ \ref zes-pset.h , \ref zes-update.h ,
+ \ref zes-expi.h , \ref zes-order.h , \ref zes-psched.h ,
+ \ref zes-update0.h .
+
+ Z39.50 diagnostics: \ref diagbib1.h .
+
+ Z39.50 externals: \ref prt-ext.h .
+
+ \section GDU Generic Data Unit (HTTP and BER)
+
+ Definitions for GDU and HTTP: \ref zgdu.h .
+
+ \section SRU SRU
+
+ SRU/SRW definitions: \ref srw.h .
+
+ SRW diagnostics: \ref diagsrw.h .
+
+ \section ILL ILL
+
+ Common header: \ref ill.h .
+
+ Codecs: \ref ill-core.h
+
+ \section ZOOM ZOOM
+
+ Common header: \ref zoom.h .
+
+ \section GFS Generic Frontend Server (GFS)
+
+ Header: \ref backend.h .
+
+*/