• https://www.w3.org/TR/rdf-syntax-grammar/
• https://www.w3.org/TR/xml-entity-names/
• https://www.w3.org/TR/xml-names/
• https://www.w3.org/TR/xmlbase/
• https://www.w3.org/TR/xml/
• https://www.w3.org/TR/xquery-31/
• https://www.w3.org/TR/xpath-31/

trang [input.xmls] output.xsd

# Extracts between table and footer
xidel -s --output-format=xml --xpath "//table/following-sibling::*[//*[@id='printfooter']/preceding::node()]" `?`

• https://gitlab.gnome.org/GNOME/libxml2

	xmllint 2>&1

xmlstarlet 2>&1

XMLStarlet is a command line toolkit to query/edit/check/transform XML documents (for more information see http://xmlstar.sourceforge.net/)

<global-options> are: -Q or –quiet - do not write anything to standard output. -C or –comp - display generated XSLT -R or –root - print root element <xsl-select> -T or –text - output is text (default is XML) -I or –indent - indent output -D or –xml-decl - do not omit xml declaration line -B or –noblanks - remove insignificant spaces from XML tree -E or –encode <encoding> - output in the given encoding (utf-8, unicode…) -N <name>=<value> - predefine namespaces (name without ‘xmlns:’) ex: xsql=urn:oracle-xsql Multiple -N options are allowed. –net - allow fetch DTDs or entities over network –help - display help

Syntax for templates: -t|–template <options> where <options> -c or –copy-of <xpath> - print copy of XPATH expression -v or –value-of <xpath> - print value of XPATH expression -o or –output <string> - output string literal -n or –nl - print new line -f or –inp-name - print input file name (or URL) -m or –match <xpath> - match XPATH expression –var <name> <value> –break or –var <name>=<value> - declare a variable (referenced by $name) -i or –if <test-xpath> - check condition <xsl:if test=”test-xpath”> –elif <test-xpath> - check condition if previous conditions failed –else - check if previous conditions failed -e or –elem <name> - print out element <xsl:element name=”name”> -a or –attr <name> - add attribute <xsl:attribute name=”name”> -b or –break - break nesting -s or –sort op xpath - sort in order (used after -m) where op is X:Y:Z, X is A - for order=”ascending” X is D - for order=”descending” Y is N - for data-type=”numeric” Y is T - for data-type=”text” Z is U - for case-order=”upper-first” Z is L - for case-order=”lower-first”

There can be multiple –match, –copy-of, –value-of, etc options in a single template. The effect of applying command line templates can be illustrated with the following XSLT analogue

xml sel -t -c “xpath0” -m “xpath1” -m “xpath2” -v “xpath3” \ -t -m “xpath4” -c “xpath5”

<global-options> are: -P, or -S - preserve whitespace nodes. (or –pf, –ps) Note that space between attributes is not preserved -O (or –omit-decl) - omit XML declaration (<?xml …?>) -L (or –inplace) - edit file inplace -N <name>=<value> - predefine namespaces (name without ‘xmlns:’) ex: xsql=urn:oracle-xsql Multiple -N options are allowed. -N options must be last global options. –net - allow network access –help or -h - display help

where <action> -d or –delete <xpath> –var <name> <xpath> -i or –insert <xpath> -t (–type) elem|text|attr -n <name> [-v (–value) <value>] -a or –append <xpath> -t (–type) elem|text|attr -n <name> [-v (–value) <value>] -s or –subnode <xpath> -t (–type) elem|text|attr -n <name> [-v (–value) <value>] -m or –move <xpath1> <xpath2> -r or –rename <xpath1> -v <new-name> -u or –update <xpath> -v (–value) <value> -x (–expr) <xpath>

XMLStarlet is a command line toolkit to query/edit/check/transform XML documents (for more information see http://xmlstar.sourceforge.net/)

XMLStarlet is a command line toolkit to query/edit/check/transform XML documents (for more information see http://xmlstar.sourceforge.net/)

Current implementation uses libxslt from GNOME codebase as XSLT processor (see http://xmlsoft.org/ for more details)

NOTE: XML Schemas are not fully supported yet due to its incomplete support in libxml2 (see http://xmlsoft.org)

XMLStarlet is a command line toolkit to query/edit/check/transform XML documents (for more information see http://xmlstar.sourceforge.net/)

XMLStarlet is a command line toolkit to query/edit/check/transform XML documents (for more information see http://xmlstar.sourceforge.net/)

<inclusive-ns-list> - the list of inclusive namespace prefixes (only for exclusive canonicalization) Example: ‘n1 n2’

<mode> is one of following: –with-comments XML file canonicalization w comments (default) –without-comments XML file canonicalization w/o comments –exc-with-comments Exclusive XML file canonicalization w comments –exc-without-comments Exclusive XML file canonicalization w/o comments

XMLStarlet is a command line toolkit to query/edit/check/transform XML documents (for more information see http://xmlstar.sourceforge.net/)

# query, -I(indenting output), -t(template:) -f(file name) -n(new line) -m(match xpath) //Trait -c(copy xpath) . -n -b(break nesting) file
xml sel -I -t -f -n -m //Trait -c . -n -b ./facade_messy.xml

# delete a path:
xml ed -d "//div[@id='toc']" ? > mod-`?`

xml val -e -d ./test.dtd ./mytest.xml

xml val -e -s ./test.xsd ./mytest.xml

• https://www.systutorials.com/docs/linux/man/1-xml_split/
• https://www.systutorials.com/docs/linux/man/1-xml_grep/

xml_grep

xml_grep --pretty_print indented --cond //www --cond [@mdate=~/2020-..-../] ./dblp-2023-10-01-07.xml 2>/dev/null
xml_grep --nb_results 4 --pretty_print indented --cond "//www/author[@string=~ /^Sebastian/]" ./dblp-2023-10-01-06.xml
xml_grep --nb_results 4 --pretty_print indented --root //www --root //inproceedings --cond pages ./dblp-2023-10-01-06.xml > results.xml
xml_grep --nb_results 4 --pretty_print indented --root "/*/*" --cond "author[string()=~/^Seb/]" ./dblp-2023-10-01-06.xml > results.xml

xsdata samples/order.xsd –output plantuml –package uml_gen

• https://developer.mozilla.org/en-US/docs/Web/XPath
• https://www.benibela.de/documentation/internettools/xpath-functions.html
• https://stackoverflow.com/questions/22214071/xpath-how-to-select-a-range-of-nodes-in-the-node-set
• https://towardsdatascience.com/xpath-for-python-89f4423415e0

# display the last names of all people in the doc
//person/@last-name

# get the 2nd person node
/people/person[2]

# get all the person nodes that have addresses in denver
//person[address/@city='denver']

# get all the addresses that have "south" in the street name
//address[contains(@street, 'south')]

# reject certain nodes:
//(* except script)
//*[not(self::script)]

# Extract an attribute value:
//a/extract(@href, '.*')

# Axes
ancestor
ancestor-or-self
attribute / @
child
descendant
descendantor-self
following
following-sibling
parent
preceding
preceding-sibling
self / .

def insert_xml(xpath, name, val=None) -> list:
    """ insert an element before the xpath element """
    val_cmd = ["-v", val] if val is not None else []
    return ["-i", xpath, "-t", "elem", "-n", name] + val_cmd

def sub_xml(xpath, name, val=None) -> list:
    """ insert an element within the xpath element """
    val_cmd = ["-v", val] if val is not None else []
    return ["-s", xpath, "-t", "elem", "-n", name] + val_cmd

def attr_xml(xpath, name, val) -> list:
    """ set the attribute of an xpath element """
    return ["-i", xpath,  "-t", "attr", "-n",  name, "-v",  val]

def val_xml(xpath, val) -> list:
    return ["-s", xpath, "-t", "text", "-n", "null", "-v", val]

def record_xml(xpath, name, val) -> list:
    return sub_xml(xpath, name) + val_xml(f"{xpath}/{name}", val)