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stag-filter(1p) [debian man page]

STAG-FILTER(1p) 					User Contributed Perl Documentation					   STAG-FILTER(1p)

stag-filter - filters a stag file (xml, itext, sxpr) for nodes of interest SYNOPSIS
stag-filter person -q name=fred file1.xml stag-filter person 'sub {shift->get_name =~ /^A*/}' file1.xml stag-filter -p My::Foo -w sxpr record 'sub{..}' file2 USAGE
stag-filter [-p|parser PARSER] [-w|writer WRITER] NODE -q tag=val FILE stag-filter [-p|parser PARSER] [-w|writer WRITER] NODE SUB FILE stag-filter [-p|parser PARSER] [-w|writer WRITER] NODE -f PERLFILE FILE DESCRIPTION
parsers an input file using the specified parser (which may be a built in stag parser, such as xml) and filters the resulting stag tree according to a user-supplied subroutine, writing out only the nodes/elements that pass the test. the parser is event based, so it should be able to handle large files (although if the node you parse is large, it will take up more memory) ARGUMENTS
-p|parser FORMAT FORMAT is one of xml, sxpr or itext, or the name of a perl module xml assumed as default -w|writer FORMAT FORMAT is one of xml, sxpr or itext, or the name of a perl module -c|count prints the number of nodes that pass the test -filterfile|f a file containing a perl subroutine (in place of the SUB argument) -q|query TAG1=VAL1 -q|query TAG2=VAL2 ... -q|query TAGN=VALN filters based on the field TAG other operators can be used too - eg <, <=, etc multiple q arguments can be passed in for more complex operations, pass in your own subroutine, see below SUB a perl subroutine. this subroutine is evaluated evry time NODE is encountered - the stag object for NODE is passed into the subroutine. if the subroutine passes, the node will be passed to the writer for display NODE the name of the node/element we are filtering on FILE the file to be parser. If no parser option is supplied, this is assumed to a be a stag compatible syntax (xml, sxpr or itext); otherwise you should parse in a parser name or a parser module that throws stag events SEE ALSO
Data::Stag perl v5.10.0 2008-12-23 STAG-FILTER(1p)

Check Out this Related Man Page

SELECTALL_XML(1p)					User Contributed Perl Documentation					 SELECTALL_XML(1p)

stag-selectall_xml - Query all elements from database with an XML output SYNOPSIS
stag-selectall_xml [-d <dbi>] [-f file of sql] [-nesting|n <nesting>] SQL DESCRIPTION
This script will query a database using either SQL provided by the script user, or using an SQL templates; the query results will be turned into XML using the DBIx::DBStag module. The nesting of the XML can be controlled by the DBStag SQL extension "USE NESTING..." EXAMPLES stag-selectall_xml -d "dbi:Pg:dbname=mydb;host=localhost" "SELECT * FROM a NATURAL JOIN b" TEMPLATES A parameterized SQL template (canned query) can be used instead of specifying the full SQL For example: stag-selectall_xml -d genedb /genedb-gene gene_symbol=Adh Or: stag-selectall_xml -d genedb /genedb-gene Adh Or: stag-selectall_xml -d genedb /genedb-gene gene_symbol@=Adh,dpp,bam,indy A template is indicated by the syntactic shorthand of using a slash to precede the template name; in this case the template is called genedb-gene. the -t option can also be used. All the remaining arguments are passed in as SQL template parameters. They can be passed in as either name=value pairs, or as a simple list of arguments which get passed into the template in order To use templates, you should have the environment variable DBSTAG_TEMPLATE_DIRS set. See DBIx::DBStag for details. LISTING AVAILABLE TEMPLATES FOR A DB stag-selectall_xml -d mydb -h LISTING VARIABLES FOR A TEMPLATE stag-selectall_xml /genedb-gene -h ENVIRONMENT VARIABLES
DBSTAG_DBIMAP_FILE A file containing configuration details for local databases DBSTAG_TEMPLATE_DIRS list of directories (separated by :s) to be searched when templates are requested COMMAND LINE ARGUMENTS
-h|help shows this page if no other arguments are given if a template is specified, gives template details if a db is specified, lists templates for that db use in conjunction with -v for full descriptions -d|dbname DBNAME this is either a full DBI locator string (eg dbi:Pg:dbname=mydb;host=localhost) or it can also be a shortened "nickname", which is then looked up in the file pointed at by the environment variable DBSTAG_DBIMAP_FILE -u|user USER database user identity -p|password PASS database password -f|file SQLFILE this is a path to a file containing SQL that will be executed, as an alternative to writing the SQL on the command line -n|nesting NESTING-EXPRESSIONS a bracketed expression indicating how to the resulting objects/XML should be nested. See DBIx::DBStag for details. -t|template TEMPLATE-NAME the name of a template; see above -wh|where WHERE-CLAUSE used to override the WHERE clause of the query; useful for combining with templates You can append to an existing where clause by using the prefix + -s|select SELECT-COLS used to override the SELECT clause of the query; useful for combining with templates -rows sometimes it is preferable to return the results as a table rather than xml or a similar nested structure. specifying -rows will fetch a table, one line per row, and columns separated by tabs -pre SQL a piece of SQL is that is executed immediately before the main query; e.g.: -pre "SET search_path=myschema,public" -o|out FILE a file to output the results to -w|writer WRITER writer class; can be any perl class, or one of these xml [default] sxpr lisp S-Expressions itext indented text -color shows results in color (sxpr and itext only) -show will show the parse of the SQL statement perl v5.12.4 2011-10-14 SELECTALL_XML(1p)
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