In MacSgmls the SGML declaration may be omitted, the following declaration will be implied:
| <!SGML "ISO 8879:1986"
| --document character set--
| CHARSET
| --base character set--
| BASESET "ISO 646-1983//CHARSET International Reference Version (IRV)//ESC 2/5 4/0"
| --described character portion--
| DESCSET 0 9 UNUSED
| 9 2 9
| 11 2 UNUSED
| 13 1 13
| 14 18 UNUSED
| 32 95 32
| 127 1 UNUSED
| --capacity set--
| CAPACITY PUBLIC "ISO 8879:1986//CAPACITY Reference//EN"
| --concrete syntax scope--
| SCOPE DOCUMENT
| --concrete syntax--
| SYNTAX PUBLIC "ISO 8879:1986//SYNTAX Reference//EN"
| --feature use--
| FEATURES
| --markup minimization features--
| MINIMIZE
| DATATAG NO --data characters may serve simultaneously as tags--
| OMITTAG YES --some tags may be omitted altogether--
| RANK NO --element ranks may be omitted from tags--
| SHORTTAG YES --short tags with omitted delimiters, attribute specifications, or generic identifier may be used--
| --link type features--
| LINK
| SIMPLE NO --simple link process definitions may be used--
| IMPLICIT NO --implicit link process definitions may be used--
| EXPLICIT NO --explicit link process definitions may be used and longest chain of link process has the specific number of links--
| --other features--
| OTHER
| CONCUR NO --instances of the specified number of document types may occur concurrently with an instance of the base document type--
| SUBDOC YES 99999999 --the spcified number of SGML subdocument entities may be open at one time--
| FORMAL YES --that public identifiers are interpreted as formal public identifiers--
| --application-specific information--
| APPINFO NONE
| >
with the exception that characters 128 through 254 will be assigned to DATACHAR. When exporting documents that use characters in this range, an accurate description of the upper half of the document character set should be added to this declaration. For ISO Latin-1, an appropriate description would be:
| --base character set--
| BASESET "ISO Registration Number 100//CHARSET ECMA-94 Right Part of Latin Alphabet Nr. 1//ESC 2/13 4/1"