@XMLXPATH[["filename"],path] : XML XPath query. The arguments are:
filename - name of XML file
path - one or more element accessors separated by a /.
If you don't specify a filename (which *must* be in double quotes), @XMLXPATH will use the XML file previously opened by @XMLOPEN.
To return an attribute, preface the attribute name with an @.
The path is a series of one or more element accessors separated by '/'. The path can be absolute (starting with '/') or relative to the current XPath location. The following are possible values for an element accessor:
'name' |
A particular element name |
name[i] |
The i-th subelement of the current element with the given name |
[i] |
The i-th subelement of the current element |
[last()] |
The last subelement of the current element |
[last()-i] |
The subelement located at the last location minus i in the current element |
name[@attrname="attrvalue"] |
The subelement containing a particular value for a given attribute (supports single AND double quotes) |
.. |
The parent of the current element |
Example:
Bookstore.xml :
<?xml version="1.0" encoding="ISO-8859-1"?>
<bookstore>
<book>
<title lang="jap">Harry Potter</title>
<price>29.99</price>
</book>
<book>
<title lang="eng">Learning XML</title>
<price>39.95</price>
</book>
<book>
<title lang="ger">Day Watch</title>
<price>14.99</price>
</book>
<book>
<title lang="eng">Winston Churchill: An Autobiography</title>
<price>49.99</price>
</book>
</bookstore>
Bookstore.btm:
@ECHO OFF
SET a=%@XMLOPEN[bookstore.xml]
SET b=%@XMLNODES[/bookstore]
DO i = 1 to %b
SET Title= %@XMLXPATH[/bookstore/book[%i]/title]
SET Price= %@XMLXPATH[/bookstore/book[%i]/price]
ECHO %Title ` costs only ` %Price
ENDDO
SET c=%@XMLCLOSE[]
Running bookstore.btm outputs:
Harry Potter costs only 29.99
Learning XML costs only 39.95
Day Watch costs only 14.99
Winston Churchill: An Autobiography costs only 49.99
XML Errors:
101 Invalid attribute index
102 No attributes available
103 Invalid namespace index
104 No namespaces available
105 Invalid element index
106 No elements available
107 Attribute does not exist
201 Unbalanced element tag
202 Unknown element prefix (can't find namespace)
203 Unknown attribute prefix (can't find namespace)
204 Invalid XML markup
205 Invalid end state for parser
206 Document contains unbalanced elements
207 Invalid XPath
208 No such child
209 Top element does not match start of path
210 DOM tree unavailable
302 Can't open file
401 Invalid XML would be generated
402 An invalid XML name has been specified
