DDX document structure

At the root of any DDX document is the DDX element. Therefore, every DDX document should have the structure shown here.

	<?xml version="1.0" encoding="UTF-8"?>

	<DDX xmlns="http://ns.adobe.com/DDX/1.0/">

	xsi:schemaLocation

	schema_location />

			<!-- Other DDX elements -->

	</DDX>

DDX elements must be in the ddx namespace. All elements and attributes described in this specification, unless otherwise indicated, belong to the following namespace: http://ns.adobe.com/DDX/1.0/. Note that the trailing / character is required.

Note: The DDX element is required in all DDX documents, but for brevity, most of the examples in this document abbreviate it or omit it entirely. (See DDX.)

The xmlns attribute specifies the DDX namespace. The xsi:schemaLocation attribute is optional and consists of a pair of strings. The second string, indicated as schema_location above, specifies the location of the schema file, ddx.xsd, on the user’s system:

	[LiveCycle ES Install path]\LiveCycle8.2\LiveCycle_ES_SDK\schemas\PDFAssembler\ddx.xsd

The DDX schema, ddx.xsd, is provided with the Assembler service. You can use it to verify that your DDX documents are well-formed XML. However, a document that passes schema validation is not necessarily valid DDX. The Assembler service runs a complete validation on DDX documents that you submit and reports violations that it finds. For information about programmatically validating a DDX document, see Validating DDX Documents in Programming with LiveCycle ES.

The main body of a DDX document consists of elements that are children of the DDX element. The following sections describe how these elements are used.

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