rxp(1)
NAME
rxp - XML parser program
SYNOPSIS
rxp [ -abemnNRsStvVx4 ] [ -o b|p|0|1|2|3|i|d ] [ U 0|1|2 ] [ -c encoding ] [ url ]
DESCRIPTION
rxp reads and parses XML from the url (or standard input if none is provided) and writes it to standard output, optionally expanding entities, defaulting attributes, and translating to a different output encoding. rxp accepts XML 1.0 and 1.1, and the corresponding versions of XML namespaces. It implements the Oasis XML catalog specification. Common option combinations are -Nxs to check a document for well- formedness and namespace well-formedness, and -VNxs to also check for DTD-validity.
OPTIONS
-a Insert declared default values for omitted attributes.
-v Be verbose.
-V Validate the document. Repeating this option will make the
program treat validity errors as well-formedness errors, and
exit after the first validity error (otherwise a warning will be
printed for each one).
-d Read the whole DTD (internal and external parts) regardless of
any standalone declaration. Otherwise a declaration
"standalone='yes'" will prevent the external part from being
read (unless validation is selected).
-N Enable XML namespace support. The document will be checked for
correct namespace syntax, and if -b is specified qualified
element and attribute names will be displayed with their URIs.
-R The value of this flag is a time limit in seconds, after which
the program will abort. This is to protect against denial-of-
service attacks using malicious documents.
-S Keep track of xml:space attributes. This will only affect
output when -b is specified.
-e Obsolete, do not use.
-E Do not expand entity references (opposite of old -e flag)
-s Be silent (that is, suppress output). Useful for benchmarking
or if you just want to see the error messages.
-b Print output as "bits".
-n Treat the input as normalised SGML rather than XML. Not
intended for general use.
-o If this flag is p, output is in the default (plain) format. If
it is b, output is printed as "bits" (equivalent to -b). If
it is 0, output is suppressed (equivalent to -s). If it is 1, 2
or 3, output is in first, second or third canonical form. If it
is i, output is a dump of the document's infoset. If it is d,
output is in a form suitable for use with "diff"; in particular
attributes are sorted into alphabetical order.
-m Merge PCData across entity references. This will only affect
the output when -b is specified.
-t Read in the input as a tree, rather than bits. Should make no
difference to the output.
-u base_uri
Use the specified base URI when resolving system identifiers.
-U This flag controls Unicode normalization checking and is only
relevant when parsing XML 1.1 documents. If it is 0, no
checking is done. If it is 1, rxp checks that the document is
fully normalized as defined by the W3C character model. If it
is 2, the document is checked and any unknown characters (which
may be ones corresponding to a newer version of Unicode than rxp
knows about) will also cause an error.
-x Strict XML mode. This suppresses some warnings (eg entity
redefinitions) but treats all XML well-formedness errors as
fatal. This flag implies the -a flag, and sets the output
encoding to UTF-8 unless the -c flag is given. It sets the
output format to first canonical form unless the -o, -b or -s
flag is given.
-c encoding
Produce output in the specified character encoding. Known
encodings include ISO-8859-1, UTF-8, ISO-10646-UCS and UTF-16.
16-bit encoding names my be suffixed with -B or -L to specify
big- or little-endian byte order (the default is the host byte
order). If no -c or -x option is given, output is in the same
encoding as the input document.
-D name sysid
Force use of the document type specified by sysid. The root
element name for validation is name. Any DTD in the document is
ignored. This flag does not imply validation; use -V if
required.
-i Do xml:id processing. Attributes named xml:id are recognised as
IDs even if not declared.
-I The same as -i, but in addition xml:id attributes are checked
for uniqueness.
-z Use a shorter format for error messages. Particularly useful
when using the parser in Emacs compilation mode, so that Emacs
can find the error location.
-4 Use pre-fifth-edition rules for XML 1.0. XML 1.0 fifth edition
extends the set of allowed name characters to match XML 1.1, and
allows unrecognised version numbers of the form 1.x to be
treated as 1.0. the -4 flag disables these changes.
EXIT STATUS
If the -V flag is given, and the document is well-formed but not valid, 2 is returned. If the document is not well-formed, or a system error occurs, 1 is returned. Otherwise 0 is returned. Since the parser can expand external entities even when not validating, it treats certain errors which are technically validity errors as well-formedness errors. If -x is not specified, some well-formedness errors produce only warnings and do not affect the exit status.
ENVIRONMENT
If the environment variable XML_CATALOG_FILES is set, XML catalog
processing is enabled. A catalog can be used to map system and public
identifiers to local files. In particular, this allows copies of
common DTDs to be kept locally, so that rxp does not have to fetch them
over the internet. XML_CATALOG_FILES should be set to a space-
separated list of catalog files. The variable XML_CATALOG_PREFER may
be set to public or system to set the initial mode for catalog
processing; the default is system.
If the variable RXPURL is set, it is used as the URL of the document to
parse. This may be useful in CGI scripts and the like to avoid shell
parsing of a user-supplied argument.
The variable http_proxy can be used to specify a proxy for HTTP
connections. The syntax is hostname[:port].
RXP release 1.4.0 RXP(1)
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