Full DCP Schema documentation with a blow by blow list of items in the XML schema.
The document comparator guide has good diagrams and gives details on using the input customisation for DCP and the Document Comparator with both deltaxml attributes and xml:space=”preserve”.
The DXP user guide explains DXP file use for XML Compare in full.
The page Specifying a Comparison Pipeline has good DXP examples (also Java and C#).
The User Guide to XML Compare includes information on pipeline configuration.
This read me page gives a list of the samples that are provided with XML Compare showing which samples demonstrate which of these features: Pipelined API, Document API, DXP or DCP. The last two columns of the ReadMe show which samples follow on from this series of blogs.
For more information about pipelines and the differences between DXP and DCP see here