This is also based on the EMF Views VPDL tutorial and is good to demonstrate the creation of simple rules using the Epsilon Comparison Language (ECL).
The rule in the where clause is responsible for the combination between the Book and the Publication instances comparing their titles and filtering just the first Chapter of each instance.
s.title = t.title for bookPublisher
The features of each model are filtered out based on the declarations in the SELECT statement.
publication.Publication.publisher,
book.Chapter.title,
book.Book.*,
book.Book join publication.Publication as bookPublisher,
After changes in the VPDL file, it's necessary to save it so Eclipse will generate the src-gen folder with viewpoint files.