xmerl_xpath(3erl) [linux man page]

xmerl_xpath(3erl)					     Erlang Module Definition						 xmerl_xpath(3erl)

NAME

       xmerl_xpath - The xmerl_xpath module handles the entire XPath 1.0 spec
	 XPath expressions typically occurs in XML attributes and are used to addres
	 parts of an XML document.

DESCRIPTION

       The  xmerl_xpath module handles the entire XPath 1.0 spec XPath expressions typically occurs in XML attributes and are used to addres parts
       of an XML document. The grammar is defined in xmerl_xpath_parse.yrl . The core functions are defined in xmerl_xpath_pred.erl .

       Some useful shell commands for debugging the XPath parser

	c(xmerl_xpath_scan).
	yecc:yecc("xmerl_xpath_parse.yrl", "xmerl_xpath_parse", true, []).
	c(xmerl_xpath_parse).

	xmerl_xpath_parse:parse(xmerl_xpath_scan:tokens("position() > -1")).
	xmerl_xpath_parse:parse(xmerl_xpath_scan:tokens("5 * 6 div 2")).
	xmerl_xpath_parse:parse(xmerl_xpath_scan:tokens("5 + 6 mod 2")).
	xmerl_xpath_parse:parse(xmerl_xpath_scan:tokens("5 * 6")).
	xmerl_xpath_parse:parse(xmerl_xpath_scan:tokens("-----6")).
	xmerl_xpath_parse:parse(xmerl_xpath_scan:tokens("parent::node()")).
	xmerl_xpath_parse:parse(xmerl_xpath_scan:tokens("descendant-or-self::node()")).
	xmerl_xpath_parse:parse(xmerl_xpath_scan:tokens("parent::processing-instruction('foo')")).

DATA TYPES

	 docEntity() = xmlElement() | xmlAttribute() | xmlText() | xmlPI() | xmlComment() :

	 nodeEntity() = xmlElement() | xmlAttribute() | xmlText() | xmlPI() | xmlNamespace() | xmlDocument() :

	 option_list() :

	   Options allows to customize the behaviour of the XPath scanner.

	   Possible options are:

	   {namespace, #xmlNamespace} :
	     Set namespace nodes, from XmlNamspace, in xmlContext

	   {namespace, Nodes} :
	     Set namespace nodes in xmlContext.

EXPORTS

       string(Str, Doc) -> [docEntity()] | Scalar

	      Equivalent to string(Str, Doc, []) .

       string(Str, Doc, Options) -> [docEntity()] | Scalar

	      Equivalent to string(Str, Doc, [], Doc, Options) .

       string(Str, Node, Parents, Doc, Options) -> [docEntity()] | Scalar

	      Types  Str = xPathString()
		     Node = nodeEntity()
		     Parents = parentList()
		     Doc = nodeEntity()
		     Options = option_list()
		     Scalar = xmlObj

	      Extracts the nodes from the parsed XML tree according to XPath. xmlObj is a record with fields type and value, where type is boolean
	      | number | string

AUTHORS

       <>

								    xmerl 1.2.8 						 xmerl_xpath(3erl)

Check Out this Related Man Page

xmerl_eventp(3erl)					     Erlang Module Definition						xmerl_eventp(3erl)

NAME

       xmerl_eventp - Simple event-based front-ends to xmerl_scan for processing
	 of XML documents in streams and for parsing in SAX style.

DESCRIPTION

       Simple  event-based  front-ends	to  xmerl_scan	for processing of XML documents in streams and for parsing in SAX style. Each contain more
       elaborate settings of xmerl_scan that makes usage of the customization functions.

EXPORTS

       file_sax(Fname::string(), CallBackModule::atom(), UserState, Options::option_list()) -> NewUserState

	      Parse file containing an XML document, SAX style. Wrapper for a call to the XML parser xmerl_scan with a hook_fun  for  using  xmerl
	      export functionality directly after an entity is parsed.

       stream(Fname::string(), Options::option_list()) -> xmlElement()

	      Parse  file  containing  an  XML	document  as a stream, DOM style. Wrapper for a call to the XML parser xmerl_scan with a continua-
	      tion_fun for handling streams of XML data. Note that the continuation_fun , acc_fun , fetch_fun , rules and close_fun options cannot
	      be user defined using this parser.

       stream_sax(Fname, CallBack::CallBackModule, UserState, Options) -> xmlElement()

	      Types  Fname = string()
		     CallBackModule = atom()
		     Options = option_list()

	      Parse  file  containing  an  XML	document  as a stream, SAX style. Wrapper for a call to the XML parser xmerl_scan with a continua-
	      tion_fun for handling streams of XML data. Note that the continuation_fun , acc_fun , fetch_fun , rules , hook_fun ,  close_fun  and
	      user_state options cannot be user defined using this parser.

       string_sax(String::list(), CallBackModule::atom(), UserState, Options::option_list()) -> xmlElement()

	      Parse  file  containing  an XML document, SAX style. Wrapper for a call to the XML parser xmerl_scan with a hook_fun for using xmerl
	      export functionality directly after an entity is parsed.

AUTHORS

       <>

								    xmerl 1.2.8 						xmerl_eventp(3erl)

Linux and UNIX Man Pages

xmerl_xpath(3erl) [linux man page]

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