Description

Determines whether a string is well-formed XML text.

Returns

True, if the function parameter is a string that contains well-formed XML text; False, otherwise.

Category

Decision functions, XML functions

Function syntax

IsXML(value)

See also

IsXmlAttribute, IsXmlDoc, IsXmlElem, IsXmlNode, IsXmlRoot, XmlParse, XmlValidate; "Using XML and WDDX" in the ColdFusion Developer's Guide

History

ColdFusion MX 7: Added this function.

Parameters

Usage

This function determines whether text is well-formed XML, that is, it conforms to all XML syntax and structuring rules. The string does not have to be a complete XML document. The function does not validate against a Document Type Definition (DTD) or XML Schema.

Example

The following example creates two strings, and tests whether they are well-formed XML text:

<!--- A well formed XML string --->
<cfset xmlString1='<order id="4323251">
    <customer firstname="Philip" lastname="Cramer" accountNum="21"/>
    <items>
        <item id="43">
            <quantity>1</quantity>
            <unitprice>15.95</unitprice>
        </item>
    </items>
</order>'
>

<!--- An invalid XML string, missing the </item> close tag --->
<cfset xmlString2='<order id="4323251">
    <customer firstname="Philip" lastname="Cramer" accountNum="21"/>
    <items>
        <item id="43">
            <quantity>1</quantity>
            <unitprice>15.95</unitprice>
    </items>
</order>'
>

<!--- Test the strings to see if they are well formed XML --->
<cfoutput>
xmlString1 contains the following text:<br><br>
#HTMLCodeFormat(xmlstring1)#
Is it well formed XML text? #IsXML(xmlString1)#<br><br>
<hr>
xmlString2 contains the following text:<br><br>
#HTMLCodeFormat(xmlstring2)#
Is it well formed XML text? #IsXML(xmlString2)#
</cfoutput>