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ONSGMLS(1)				    Reference				       ONSGMLS(1)

NAME
       onsgmls - An SGML/XML parser and validator

SYNOPSIS
       onsgmls [-BCdeghlnpRrsuvx] [-alinktype] [-Aarchitecture] [-bbctf] [-csysid...]
	       [-Ddirectory] [-Emax_errors] [-ffile] [-iname] [-ooutput_option...] [-tfile]
	       [-wwarning_type...] [sysid...]

DESCRIPTION
       onsgmls parses and validates the SGML document whose document entity is specified by the
       system identifiers

       and prints on the standard output a simple text representation of its Element Structure
	Information Set. (This is the information set which a structure-controlled conforming
	SGML application should act upon.) If more than one system identifier is specified, then
	the corresponding entities will be concatenated to form the document entity. Thus the
	document entity may be spread among several files; for example, the SGML declaration,
	prolog and document instance set could each be in a separate file. If no system
	identifiers are specified, then onsgmls will read the document entity from the standard
	input. A command line system identifier of - can be used to refer to the standard input.
	(Normally in a system identifier, <OSFD>0 is used to refer to standard input.)

       Part of an SGML System Conforming to International Standard ISO 8879 -- Standard
       Generalized Markup Language. An SGML Extended Facilities system conforming to Annex A of
       Internal Standard ISO/IEC 10744 -- Hypermedia/Time-based Structuring Language

       The following options are available:

       -alinktype, --activate=linktype
	   Make link type linktype active. Not all ESIS information is output in this case: the
	   active LPDs are not explicitly reported, although each link attribute is qualified
	   with its link type name; there is no information about result elements; when there are
	   multiple link rules applicable to the current element, onsgmls always chooses the
	   first.

       -Aarchitecture, --architecture=architecture
	   Parse with respect to architecture architecture.

       -bbctf, --bctf=bctf, -bencoding, --encoding=encoding
	   This determines the encoding used for output. If in fixed character set mode it
	   specifies the name of an encoding; if not, it specifies the name of a BCTF.

       -B, --batch_mode
	   Batch mode. Parse each

	   specified on the command line separately, rather than concatenating them. This is
	    useful mainly with -s.

	    If -tfilename is also specified, then the specified filename will be prefixed to the
	    sysid to make the filename for the RAST result for each sysid.

       -csysid, --catalog=sysid
	   Map public identifiers and entity names to system identifiers using the catalog entry
	   file whose system identifier is sysid. Multiple -c options are allowed. If there is a
	   catalog entry file called catalog in the same place as the document entity, it will be
	   searched for immediately after those specified by -c.

       -C, --catalogs
	   The

	   arguments specify catalog files rather than the document entity. The document entity
	    is specified by the first DOCUMENT entry in the catalog files.

       -Ddirectory, --directory=directory
	   Search directory for files specified in system identifiers. Multiple -D options are
	   allowed. See the description of the osfile storage manager for more information about
	   file searching.

       -e, --open-entities
	   Describe open entities in error messages. Error messages always include the position
	   of the most recently opened external entity.

       -Emax_errors, --max-errors=max_errors
	   onsgmls will exit after max_errors errors. If max_errors is 0, there is no limit on
	   the number of errors. The default is 200.

       -ffile, --error-file=file
	   Redirect errors to file. This is useful mainly with shells that do not support
	   redirection of stderr.

       -g, --open-elements
	   Show the generic identifiers of open elements in error messages.

       -h, --help
	   Show a help message and exit.

       -iname, --include=name
	   Pretend that

	   <!ENTITY % name "INCLUDE">

	   occurs at the start of the document type declaration subset in the SGML document
	   entity. Since repeated definitions of an entity are ignored, this definition will take
	   precedence over any other definitions of this entity in the document type declaration.
	   Multiple -i options are allowed. If the SGML declaration replaces the reserved name
	   INCLUDE then the new reserved name will be the replacement text of the entity.
	   Typically the document type declaration will contain

	   <!ENTITY % name "IGNORE">

	   and will use %name; in the status keyword specification of a marked section
	   declaration. In this case the effect of the option will be to cause the marked section
	   not to be ignored.

       -n, --error-numbers
	   Show message numbers in error messages.

       -ooutput_option, --option=output_option
	   Output additional information according to output_option:

	   entity Output definitions of all general entities not just for data or subdoc entities
	   that are referenced or named in an ENTITY or ENTITIES attribute.

	   id Distinguish attributes whose declared value is ID.

	   line Output L commands giving the current line number and filename.

	   included Output an i command for included sub-elements.

	   empty Output an e command for elements which are not allowed to have an end-tag, that
	   is those with a declared content of empty or with a content reference attribute.

	   notation-sysid Output an f command before an N command, if a system identifier could
	   be generated for that notation.

	   nonsgml In fixed character set mode, output \% escape sequences for non-SGML data
	   characters. Non-SGML data characters can result from numeric character references.

	   data-attribute Output the notation name and attributes for DATA attributes. Otherwise,
	   DATA attributes are treated like CDATA attributes. For more details see clause 4.4.3
	   of Annex K of ISO 8879.

	   comment Output an _ command with the contents of a comment. Multiple comments in a
	   single comment declaration will result in multiple distinct _ commands, just as if the
	   comments were each in a separate comment declaration.

	   omitted Output an o command before a command which was implied by the input document,
	   but omitted from the actual markup. This currently affects (,), and A commands.

	   tagomit As omitted, but only for ( and ) commands.

	   attromit As omitted, but only for A commands.

	   Multiple -o options are allowed.

       -p, --only-prolog
	   Parse only the prolog.  onsgmls will exit after parsing the document type declaration.
	   Implies -s.

       -R, --restricted
	   Restrict file reading. This option is intended for use with onsgmls-based Web tools
	   (e.g. CGI scripts) to prevent reading of arbitrary files on the Web server. With this
	   option enabled, onsgmls will not read any local files unless they are located in a
	   directory (or subdirectory) specified by the -D option or included in the
	   SGML_SEARCH_PATH environment variable. As a further security precaution, this option
	   limits filesnames to the characters A-Z, a-z, 0-9, '?', '.', '_', '-' and does not
	   allow filenames containing "..". On systems with MS-DOS file names ':' and '\' are
	   also allowed.

       -s, --no-output
	   Suppress output. Error messages will still be printed.

       -tfile, --rast-file=file
	   Output to file the RAST result as defined by ISO/IEC 13673:1995 (actually this isn't
	   quite an IS yet; this implements the Intermediate Editor's Draft of 1994/08/29, with
	   changes to implement ISO/IEC JTC1/SC18/WG8 N1777). The normal output is not produced.

       -v, --version
	   Print the version number.

       -wtype, --warning=type
	   Control warnings and errors. Multiple -w options are allowed. The following values of
	   type enable warnings:

	   xml Warn about constructs that are not allowed by XML.

	   mixed Warn about mixed content models that do not allow #PCDATA anywhere.

	   sgmldecl Warn about various dubious constructions in the SGML declaration.

	   should Warn about various recommendations made in ISO 8879 that the document does not
	   comply with. (Recommendations are expressed with "should", as distinct from
	   requirements which are usually expressed with "shall".)

	   default Warn about defaulted references.

	   duplicate Warn about duplicate entity declarations.

	   undefined Warn about undefined elements: elements used in the DTD but not defined.

	   unclosed Warn about unclosed start and end-tags.

	   empty Warn about empty start and end-tags.

	   net Warn about net-enabling start-tags and null end-tags.

	   min-tag Warn about minimized start and end-tags. Equivalent to combination of
	   unclosed, empty and net warnings.

	   unused-map Warn about unused short reference maps: maps that are declared with a short
	   reference mapping declaration but never used in a short reference use declaration in
	   the DTD.

	   unused-param Warn about parameter entities that are defined but not used in a DTD.
	   Unused internal parameter entities whose text is INCLUDE or IGNORE won't get the
	   warning.

	   notation-sysid Warn about notations for which no system identifier could be generated.

	   all Warn about conditions that should usually be avoided (in the opinion of the
	   author). Equivalent to: mixed, should, default, undefined, sgmldecl, unused-map,
	   unused-param, empty and unclosed.

	   immediate-recursion Warn about immediately recursive elements. For more detais see
	   clause 2.2.5 of Annex K of ISO 8879.

	   fully-declared Warn if the document instance fails to be fully declared. This has the
	   effect of changing the SGML declaration to specify IMPLYDEF ATTLIST NO ELEMENT NO
	   ENTITY NO NOTATION NO. For more details see clause 2.2.1 of Annex K of ISO 8879.

	   fully-tagged Warn if the document instance fails to be fully-tagged. This has the
	   effect of changing the SGML declaration to specify DATATAG NO, RANK NO, OMITTAG NO,
	   SHORTTAG STARTTAG EMPTY NO and SHORTTAG ATTRIB OMITNAME NO. For more details see
	   clause 2.2.2 of Annex K of ISO 8879.

	   amply-tagged, amply-tagged-recursive Warn if the doucment instance fails to be
	   amply-tagged. Implicitly defined elements may be immediately recurisve if
	   amply-tagged-recursive is specified. This has the effect of changing the SGML
	   declaration to specify DATATAG NO, RANK NO, OMITTAG NO, SHORTTAG ATTRIB OMITNAME NO
	   and either IMPLYDEF ELEMENT ANYOTHER or IMPLYDEF ELEMENT YES. For more details see
	   clause 2.2.4 of Annex K of ISO 8879.

	   type-valid Warn if the document instance fails to be type-valid. This has the effect
	   of changing the SGML declaration to specify VALIDITY YES. For more details see clause
	   2.2.3 of Annex K of ISO 8879.

	   entity-ref Warn about references to non-predefined entities. This has the effect of
	   changing the SGML declaration to specify ENTITIES REF NONE. For more details see
	   clause 2.3.2 of Annex K of ISO 8879.

	   external-entity-ref Warn about references to external entities. This includes
	   references to an external DTD subset. This has the effect of changing the SGML
	   declaration to specify ENTITIES REF INTERNAL. For more details see clause 2.3.3 of
	   Annex K of ISO 8879.

	   integral Warn if the document instance is not integrally stored. This has the effect
	   of changing the SGML declaration to specify ENTITIES INTEGRAL YES. For more details
	   see clause 2.3.1 of Annex K of ISO 8879.

	   A warning can be disabled by using its name prefixed with no-. Thus
	   -wall-wno-duplicate will enable all warnings except those about duplicate entity
	   declarations.

	   The following values for warning_type disable errors:

	   no-idref Do not give an error for an ID reference value which no element has as its
	   ID. The effect will be as if each attribute declared as an ID reference value had been
	   declared as a name.

	   no-significant Do not give an error when a character that is not a significant
	   character in the reference concrete syntax occurs in a literal in the SGML
	   declaration. This may be useful in conjunction with certain buggy test suites.

	   no-valid Do not require the document to be type-valid. This has the effect of changing
	   the SGML declaration to specify VALIDITY NOASSERT and IMPLYDEF ATTLIST YES ELEMENT
	   YES. An option of -wvalid has the effect of changing the SGML declaration to specify
	   VALIDITY TYPE and IMPLYDEF ATTLIST NO ELEMENT NO. If neither -wvalid nor -wno-valid
	   are specified, then the VALIDITY and IMPLYDEF specified in the SGML declaration will
	   be used.

	   no-afdr Do not give errors when AFDR meta-DTD notation features are used in the DTD.
	   These errors are normally produced when parsing the DTD, but suppressed when parsing
	   meta-DTDs.

       -x, --references
	   Show information about relevant clauses (from ISO 8879:1986) in error messages.

       The following options are also supported for backward compatibility with sgmls:

       -d
	   Same as -wduplicate.

       -l
	   Same as -oline.

       -msysid
	   Same as -c.

       -r
	   Same as -wdefault.

       -u
	   Same as -wundef.

SEE ALSO
       ospent(1), ospam(1), onsgmlnorm(1), osx(1)

AUTHORS
       James Clark
	   Author.

       Ian Castle <ian.castle@openjade.org>
	   Author.

COPYRIGHT
OpenSP					  November 2002 			       ONSGMLS(1)
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