The DXP User Guide provides:
- the technical background to pipelining
- a full explanation of the purpose
- details on all features with extracts from the DTD
- the differences between using a file and using the PipelinedComparator Java class
- the version history of the DXP definition in DTD
This diagram of an example pipeline provides a good introduction to the concepts described in the DXP User Guide.
DXP Uses Document Type Definition
The DXP file is defined by DTD files. A DTD defines the structure and the allowed elements and attributes of an XML document. If you are unfamiliar with this system, there is an introduction to DTDs at w3schools. Much of this seems quite obvious but there are a couple areas that are non-intuitive:
- the attribute value can be #IMPLIED, this means that the attribute is optional
- the symbol + means one or more
- the symbol ? means zero or one
- the symbol * means zero or more
Using the DTD enables XML editors like oXygen to assist with writing the DXP file with features like auto- complete
Other Articles
A Beginner’s Guide to XML Comparison
Pipelines and the Differences Between DXP and DCP
For more information about DCP and the Document Comparator see here.
The location of DXP/DCP files on a computer
Links to useful documentation
