XmlParse

Description

Converts XML text into an XML document object.

Returns

An XML document object.

Category

Conversion functions, XML functions

Function syntax

XmlParse(xmlText [, caseSensitive ], validator])

See also

cfxml, IsXML, ToString, XmlFormat, XmlNew, XmlSearch, XmlTransform, XmlValidate; Using XML and WDDX in the Developing ColdFusion Applications

History

ColdFusion MX 7:

  • Added the validator parameter.

  • Added support for filenames and URLs in the xmlText parameter.

  • Added support for relative URLs and pathnames.

ColdFusion MX: Added this function.

Parameters

Parameter

Description

xmlText

Any of the following:

  • A string containing XML text.

  • The name of an XML file.

  • The URL of an XML file; valid protocol identifiers include http, https, ftp, and file.

caseSensitive

  • Yes: maintains the case of document elements and attributes.

  • No: Default

validator

Any of the following:

  • The name of a Document Type Definition (DTD) or XML Schema file.

  • The URL of a DTD or Schema file; valid protocol identifiers include http, https, ftp, and file.

  • A string representation of a DTD or Schema.

  • An empty string; in this case, the XML file must contain an embedded DTD or Schema identifier, which is used to validate the document.

Usage

If you specify a relative URL or pathname in a parameter, ColdFusion uses the directory (or, for URLs, the logical directory) that contains the current ColdFusion page as the path root.

The caseSensitive parameter value determines whether identifiers whose characters are of varying case, but are otherwise the same, refer to different components; for example:

  • If true, the element or attribute names “name” and “NAME” refer to different elements or attributes.

  • If false, these names refer to the same elements or attributes.

If your XML object is case sensitive, you cannot use dot notation to reference an element or attribute name. Use the name in associative array (bracket) notation, or a reference that does not use the case-sensitive name (such as xmlChildren[1]) instead. In the following code, the first line will work with a case-sensitive XML object. The second and third lines cause errors:

MyDoc.xmlRoot.XmlAttributes["Version"] = "12b"; 
MyDoc.xmlRoot.XmlAttributes.Version = "12b"; 
MyDoc.MyRoot.XmlAttributes["Version"] = "12b";

The optional validator parameter specifies a DTD or Schema to use to validate the document. If the parser encounters a validation error, ColdFusion generates an error and stops parsing the document. Specify a validator parameter to make the XmlParse function validate your document. If you do not specify a validator parameter, the XML file must specify the DTD or schema using the xsi:noNamespaceSchemaLocation tag. If you specify a validator parameter, also specify a caseSensitive parameter.

Note: If you specify an empty string as the third parameter to the XMLParse function and specify a validator such as xsi:noNamespaceSchemaLocation within an XML document, it must specify a complete URL. However, with XMLValidate, it can be just a filename that is found relative to the CFML template doing validation.

If you do not specify a validator parameter, the xmlText parameter can specify a well-formed XML fragment, and does not have to specify a complete document.

Note: To convert an XML document object back into a string, use the ToString function.

Example

The following example has three parts: an XML file, a DTD file, and a CFML page that parses the XML file and uses the DTD for validation. The CFML file displays the returned XML document object. To show the results of invalid XML, modify the bmenuD.xml.

Note: The DTD used in the following example represents the same XML structure as the Schema used in the XmlValidate example

The custorder.xml file is as follows:

<?xml version="1.0" encoding="UTF-8"?> 
<!DOCTYPE order SYSTEM "C:\ColdFusion\wwwroot\examples\custorder.dtd"> 
<order id="4323251"> 
    <customer firstname="Philip" lastname="Cramer" accountNum="21"/> 
    <items> 
        <item id="43"> 
            <name>    Deluxe Carpenter&apos;s Hammer</name> 
            <quantity>1</quantity> 
            <unitprice>15.95</unitprice> 
        </item> 
        <item id="54"> 
            <name>    36&quot; Plastic Rake</name> 
            <quantity>2</quantity> 
            <unitprice>6.95</unitprice> 
        </item> 
        <item id="68"> 
            <name>    Standard paint thinner</name> 
            <quantity>3</quantity> 
            <unitprice>8.95</unitprice> 
        </item> 
    </items> 
</order>

The custorder.dtd file is as follows:

<!ELEMENT order (customer, items)> 
<!ATTLIST order 
    id CDATA #REQUIRED> 
<!ELEMENT customer EMPTY> 
<!ATTLIST customer 
    firstname CDATA #REQUIRED 
    lastname CDATA #REQUIRED 
    accountNum CDATA #REQUIRED> 
<!ELEMENT items (item+)> 
<!ELEMENT item (name, quantity, unitprice)> 
<!ATTLIST item  
    id CDATA #REQUIRED> 
<!ELEMENT name (#PCDATA)> 
<!ELEMENT quantity (#PCDATA)> 
<!ELEMENT unitprice (#PCDATA)>

The CFML file is as follows. It uses a filename for the XML file and a URL for the DTD. Note that the XML and URL paths must be absolute.

<cfset 
myDoc=XMLParse("C:\ColdFusion\wwwroot\examples\custorder.xml", 
false, "http://localhost:8500/examples/custorder.dtd")> 
Dump of myDoc XML document object<br> 
<cfdump var="#myDoc#">