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 [sysid...] 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), osgmlnorm(1), osx(1)
AUTHORS
James Clark
Author.
Ian Castle <ian.castle@openjade.org>
Author.
COPYRIGHT