GSP
Quick Navigator

Search Site

Unix VPS
A - Starter
B - Basic
C - Preferred
D - Commercial
MPS - Dedicated
Previous VPSs
* Sign Up! *

Support
Contact Us
Online Help
Handbooks
Domain Status
Man Pages

FAQ
Virtual Servers
Pricing
Billing
Technical

Network
Facilities
Connectivity
Topology Map

Miscellaneous
Server Agreement
Year 2038
Credits
 

USA Flag

 

 

Man Pages


Manual Reference Pages  -  XMERL_XPATH (3)

NAME

xmerl_xpath - The xmerl_xpath module handles the entire XPath 1.0 spec.

CONTENTS

Description
Exports
Authors

DESCRIPTION

The xmerl_xpath module handles the entire XPath 1.0 spec. XPath expressions 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

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.

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

<

Search for    or go to Top of page |  Section 3 |  Main Index


XMERL_XPATH (3) xmerl 1.3.10

Powered by GSP Visit the GSP FreeBSD Man Page Interface.
Output converted with manServer 1.07.