The system declaration for SP is as follows:
<!SYSTEM "ISO 8879:1986" CHARSET BASESET "ISO 646-1983//CHARSET International Reference Version (IRV)//ESC 2/5 4/0" DESCSET 0 128 0 CAPACITY PUBLIC "ISO 8879:1986//CAPACITY Reference//EN" FEATURES MINIMIZE DATATAG NO OMITTAG YES RANK YES SHORTTAG YES LINK SIMPLE YES 65535 IMPLICIT YES EXPLICIT YES 1 OTHER CONCUR NO SUBDOC YES 100 FORMAL YES SCOPE DOCUMENT SYNTAX PUBLIC "ISO 8879:1986//SYNTAX Reference//EN" SYNTAX PUBLIC "ISO 8879:1986//SYNTAX Core//EN" VALIDATE GENERAL YES MODEL YES EXCLUDE YES CAPACITY NO NONSGML YES SGML YES FORMAL YES SDIF PACK NO UNPACK NO>
The limit for the SUBDOC parameter is memory dependent.
Any legal concrete syntax may be used.
James Clark