xmerl_xpath - The xmerl_xpath module handles the entire XPath 1.0 spec.
Please see following description for synopsis
xmerl_xpath(3) Erlang Module Definition xmerl_xpath(3) NAME xmerl_xpath - The xmerl_xpath module handles the entire XPath 1.0 spec. DESCRIPTION The xmerl_xpath module handles the entire XPath 1.0 spec. XPath expres- sions typically occur in XML attributes and are used to address 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() = #xmlDocument{} | [docNodes()]: docNodes() = #xmlElement{} | #xmlAttribute{} | #xmlText{} | #xmlPI{} | #xmlComment{} | #xmlNsNode{}: nodeEntity() = #xmlElement{} | #xmlAttribute{} | #xmlText{} | #xmlPI{} | #xmlComment{} | #xmlNsNode{} | #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. parentList() = [{atom(), integer()}]: xPathString() = string(): 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 1.3.28 xmerl_xpath(3)