  Prolog's support for dynamic programming, meta programming and text
processing using context free grammars make the language highly suitable for
defining domain specific languages (DSL) as well as analysing, refactoring or
generating expression states in other (programming) languages. Well known DSLs
are the DCG (Definite Clause Grammar) notation and constraint languages such as
CHR. These extensions use Prolog operator declarations and the {...} notation
to realise a good syntax. When external languages, such as HTML, SQL or
JavaScript enter the picture, operators no longer satisfy for embedding
snippets of these languages into a Prolog source file. In addition, Prolog has
poor support for quoting long text fragments.
  Haskell introduced quasi quotationsto resolve this problem. In this paper we
`ported' the Haskell mechanism for quasi quoting to Prolog. We show that this
can be done cleanly and that quasi quoting can solve the above mentioned
problems.
