Print (XmlDoc/XmlNode subroutine)

Print selected subtree (XmlDoc and XmlNode classes)

This subroutine displays an XmlDoc subtree in a readable form, useful for debugging, for example.

Syntax

nr:Print[( [xpath], [options])] Throws XPathError

Syntax terms

nr	An XmlDoc or XmlNode, used as the context node for the XPath expression. If an XmlDoc, the Root node is the context node.
xpath	A Unicode string that is an XPath expression that results in a nodelist, the head of which is the top of the subtree to print. An optional argument, its default is a period (.), that is, the node referenced by the method object (<>nr).
options	A blank delimited string that can contain one or more of the following options, which are identified below and described in greater detail in "XmlDoc API serialization options": AllowXmlDecl or NoXmlDecl Whether or not the serialization will contain the "XML Declaration" (<?xml version=...?>), if the value of the Version property is a non-null string, if the XmlDoc is not empty, and if the node selected by xpath is the Root node. AllowXmlDecl is the default. CharacterEncodeAll Use character encoding in all contexts (that is, not only in Attribute or Element values) to display Unicode characters that do not translate to EBCDIC. Compact, Expanded, AttributeCompact, ElementCompact, or BothCompact One of these mutually exclusive output formats, which control the degree of expansion or compression of the display of a serialized element's content. Indent n Indent Element children (and, depending on the compaction option, above, in effect, attributes and the closing characters "/>" of an empty Element) n spaces (default 3) from the beginning of the Element's Start-Tag. NoEmptyElt Deprecated as of Sirius Mods version 7.0, serializes all empty elements with a start tag followed by an end tag. The default is to serialize an empty element with an empty element tag (as in <middleName/>). OmitNullElement An Element node that has no children and no Attributes will not be serialized, unless it is the top level Element in the subtree being serialized. SortCanonical This deprecated option serializes namespace declarations and attributes in sorted order (from lowest to highest with Unicode code ordering).

Usage notes

• Options may be specified in any case. For example, you can use either NoXmlDecl or noxmldecl, interchangeably.
• As a debugging aide, Print may be issued for the root node of an XmlDoc that is not well-formed, that is, does not contain an Element.
• As of Sirius Mods version 7.6, Attribute values are always serialized within double-quotation-mark (") delimiters, and a double-quotation mark character in an attribute value is serialized as ". Prior to version 7.6, this convention was not strictly observed.

Example

In the following example, the Print method is called first in its default form with no arguments, then with explicit values for its options:

Begin Print 'Print method' Print '***********' %doc is Object XmlDoc %doc = New Call %doc:LoadXml('<top><a><b>05</b></a><a2/></top>') %doc:Version ='1.0' Call %doc:Print Print 'Non-default display:' Call %doc:Print('/', 'NoXmlDecl NoEmptyElt Indent 6 Expanded') End

The example results follow:

<?xml version="1.0"?> <top> <a> <b>05</b> </a> <a2/> </top> Non-default display: <top> <a> <b> 05 </b> </a> <a2> </a2> </top>

Request-cancellation errors

• xpath is invalid.
• Result of xpath is empty.
• options values are invalid.
• Insufficient free space exists in CCATEMP.

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

• For more information about using XPath expressions, see "XPath".
• To more accurately serialize an XmlDoc, as opposed to providing a "displayable" form, use the Serial function. The Print subroutine, like its analogs Audit and Trace, inserts line breaks and performs indentation.
• Additional serializing methods include:
  • WebSend
  • AddXml (HttpRequest class)