AllowXmlElement (XmlDoc property)

May Element names begin with "xml"? (XmlDoc class)

The AllowXmlElement property indicates whether or not the method object XmlDoc allows the deserialization of an XML document that contains Elements that begin with the character sequence xml (regardless of case).

A Boolean value of True allows such deserializations. The default value, False, cancels the request if such a deserialization is attempted.

Syntax

%currentBoolean = doc:AllowXmlElement doc:AllowXmlElement = newBoolean

Syntax terms

%currentBoolean	The Boolean enumeration value of doc's AllowXmlElement property. For more information about these enumerations, see "Using Boolean enumerations".
doc	An XmlDoc object expression.
newBoolean	The Boolean value to assign to doc's AllowXmlElement property.

Usage notes

• Deserializing Elements whose name begins with "xml" was restricted due to the following excerpt from the XML standard:
  • Names beginning with the string "xml", or any string which would match (('X'|'x') ('M'|'m') ('L'|'l')), are reserved for standardization in this or future versions of this specification.

  Therefore, you should use care with element names: using an element name such as XML makes you vulnerable to a change in the standards that would leave your document incompatible with them.

  Note: This property does not allow the AddElement method to add an element with a name that starts with "xml". However, as shown in the "Adding an element to a document" example below, it is easy to use the LoadXml method to accomplish this.

• The AllowXmlElement method was introduced in "Sirius Mods" Version 7.3, and it has also been provided by maintenance for Version 6.8 and Version 7.2.

Examples

Displaying the property

The following example obtains the string value of the AllowXmlElement property:

%str = %doc:AllowXmlElement:ToString

Taking advantage of the implicit-ToString feature, you can print this value directly by using this:

print %doc:AllowXmlElement

Deserializing an entire XML document

The following request:

begin %d object xmlDoc auto new %d:AllowXmlElement = true %d:loadXml('<t>Test<xmlnode></xmlnode></t>') printText{~} is {%d:allowXmlElement} end

prints

%d:allowXmlElement is True

Note: Using the PrintText statement is described in printText. Printing an enumeration value without a ToString method is described in the first "Note" in ?? refid=crenums..

Adding an element to a document

The following request:

begin %d object xmlDoc auto new %n object xmlNode %n = %d:addElement('xyz') %d:allowXmlElement = true %n:LoadXml('<xmlElt/>') %d:print end

prints

<xyz> <xmlElt/> </xyz>

Request-Cancellation Errors (for set method)

• newBoolean is an invalid value (ie: not a Boolean value).

See also

XmlDoc class XmlNode class XmlNodelist class	List of XmlDoc methods List of XmlNode methods List of XmlNodelist methods List of XmlDoc API methods	XmlDoc methods syntax XmlNode methods syntax XmlNodelist methods syntax
Notation conventions for methods