XMLLINT(1)xmllint Manual XMLLINT(1)NAMExmllint - command line XML tool
SYNOPSISxmllint [--version | --debug | --shell | --debugent | --copy |
--recover | --noent | --noout | --nonet | --path paths |
--load-trace | --htmlout | --nowrap | --valid | --postvalid |
--dtdvalid URL | --dtdvalidfpi FPI | --timing | --output file |
--repeat | --insert | --compress | --html | --xmlout | --push |
--memory | --maxmem nbbytes | --nowarning | --noblanks |
--nocdata | --format | --encode encoding | --dropdtd |
--nsclean | --testIO | --catalogs | --nocatalogs | --auto |
--xinclude | --noxincludenode | --loaddtd | --dtdattr |
--stream | --walker | --pattern patternvalue | --chkregister |
--relaxng | --schema | --c14n] [xmlfile]
INTRODUCTION
The xmllint program parses one or more XML files, specified on the com‐
mand line as xmlfile (or the standard input if the filename provided is
- ). It prints various types of output, depending upon the options se‐
lected. It is useful for detecting errors both in XML code and in the
XML parser itself.
It is included in libxml2.
OPTIONS--version
Display the version of libxml2 used.
--debug
Parse a file and output an annotated tree of the in-memory ver‐
sion of the document.
--shell
Run a navigating shell. Details on available commands in shell
mode are below.
--debugent
Debug the entities defined in the document.
--copy Test the internal copy implementation.
--recover
Output any parsable portions of an invalid document.
--noent
Substitute entity values for entity references. By default, xm‐
llint leaves entity references in place.
--nocdata
Substitute CDATA section by equivalent text nodes.
--nsclean
Remove redundant namespace declarations.
--noout
Suppress output. By default, xmllint outputs the result tree.
--nonet
Do not use the Internet to fetch DTD's or entities.
--path paths
Use the list (separated by space or column) of filesystem path
specified by paths to load DTDs or entities .
--load-trace
Display to stderr all the documents loaded during the process‐
ing.
--htmlout
Output results as an HTML file. This causes xmllint to output
the necessary HTML tags surrounding the result tree output so
the results can be displayed in a browser.
--nowrap
Do not output HTML doc wrapper.
--valid
Determine if the document is a valid instance of the included
Document Type Definition (DTD). A DTD to be validated against
also can be specified at the command line using the --dtdvalid
option. By default, xmllint also checks to determine if the doc‐
ument is well-formed.
--postvalid
Validate after parsing is completed.
--dtdvalid URL
Use the DTD specified by URL for validation.
--dtdvalidfpi FPI
Use the DTD specified by the Public Identifier FPI for valida‐
tion, note that this will require a Catalog exporting that Pub‐
lic Identifier to work.
--timing
Output information about the time it takes xmllint to perform
the various steps.
--output file
Define a file path where xmllint will save the result of pars‐
ing. Usually the programs build a tree and save it on stdout,
with this option the result XML instance will be saved onto a
file.
--repeat
Repeat 100 times, for timing or profiling.
--insert
Test for valid insertions.
--compress
Turn on gzip compression of output.
--html Use the HTML parser.
--xmlout
Used in conjunction with --html. Usually when HTML is parsed the
document is saved with the HTML serializer, but with this option
the resulting document is saved with the XML serializer. This is
primarily used to generate XHTML from HTML input.
--push Use the push mode of the parser.
--memory
Parse from memory.
--maxmem nnbytes
Test the parser memory support. nnbytes is the maximum number of
bytes the library is allowed to allocate. This can also be used
to make sure batch processing of XML files will not exhaust the
virtual memory of the server running them.
--nowarning
Do not emit warnings from the parser and/or validator.
--noblanks
Drop ignorable blank spaces.
--format
Reformat and reindent the output. The $XMLLINT_INDENT environ‐
ment variable controls the indentation (default value is two
spaces " ").
--testIO
Test user input/output support.
--encode encoding
Output in the given encoding.
--catalogs
Use the catalogs from $SGML_CATALOG_FILES. Otherwise
/etc/xml/catalog is used by default.
--nocatalogs
Do not use any catalogs.
--auto Generate a small document for testing purposes.
--xinclude
Do XInclude processing.
--noxincludenode
Do XInclude processing but do not generate XInclude start and
end nodes.
--loaddtd
Fetch external DTD.
--dtdattr
Fetch external DTD and populate the tree with inherited at‐
tributes.
--dropdtd
Remove DTD from output.
--stream
Use streaming API - useful when used in combination with --re‐
laxng or --valid options for validation of files that are too
large to be held in memory.
--walker
Test the walker module, which is a reader interface but for a
document tree, instead of using the reader API on an unparsed
document it works on a existing in-memory tree. Used in debug‐
ging.
--chkregister
Turn on node registration. Useful for developers testing libxml2
node tracking code.
--pattern patternvalue
Used to exercise the pattern recognition engine, which can be
used with the reader interface to the parser. It allows to se‐
lect some nodes in the document based on an XPath (subset) ex‐
pression. Used for debugging.
--relaxng schema
Use RelaxNG file named schema for validation.
--schema schema
Use a W3C XML Schema file named schema for validation.
--c14n Use the W3C XML Canonicalisation (C14N) to serialize the result
of parsing to stdout. It keeps comments in the result.
SHELLxmllint offers an interactive shell mode invoked with the --shell com‐
mand. Available commands in shell mode include:
base display XML base of the node
bye leave shell
cat node
Display node if given or current node.
cd path
Change the current node to path (if given and unique) or root if
no argument given.
dir path
Dumps information about the node (namespace, attributes, con‐
tent).
du path
Show the structure of the subtree under path or the current
node.
exit Leave the shell.
help Show this help.
free Display memory usage.
load name
Load a new document with the given name.
ls path
List contents of path (if given) or the current directory.
pwd Display the path to the current node.
quit Leave the shell.
save name
Saves the current document to name if given or to the original
name.
validate
Check the document for error.
write name
Write the current node to the given filename.
CATALOGS
Catalog behavior can be changed by redirecting queries to the user's
own set of catalogs. This can be done by setting the XML_CATALOG_FILES
environment variable to a list of catalogs. An empty one should deacti‐
vate loading the default /etc/xml/catalog default catalog.
DEBUGGING CATALOGS
Setting the environment variable XML_DEBUG_CATALOG using the command
"export XML_DEBUG_CATALOG=" outputs debugging information related to
catalog operations.
ERROR RETURN CODES
On the completion of execution, Xmllint returns the following error
codes:
0 No error
1 Unclassified
2 Error in DTD
3 Validation error
4 Validation error
5 Error in schema compilation
6 Error writing output
7 Error in pattern (generated when [--pattern] option is used)
8 Error in Reader registration (generated when [--chkregister] op‐
tion is used)
9 Out of memory error
AUTHORS
John Fleck, Ziying Sherwin, Heiko Rupp.
XMLLINT(1)
