The Interpreter pattern discussed in Chapter 11 does not cover parsing. An interpreter without a parser
is pretty incomplete, unless you persuade your users to write PHP code to invoke the interpreter! Third-
party parsers are available that could be deployed to work with the Interpreter pattern, and that would
probably be the best choice in a real-world project. This appendix, however, presents a simple object-
oriented parser designed to work with the MarkLogic interpreter built in Chapter 11. Be aware that these
examples are no more than a proof of concept. They are not designed for use in real-world ...
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