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XVCL is a general-purpose language for configuring variants in all sorts of textual documents (including programs). It is based on frame technology. XVCL processor automates the customization process to produce system from specification of variants.
The Frame Processing Language (FPL) is an XML language based on the Frame Technology by Paul G. Bassett as described in his book “Framing Software Reuse: lessons from the real world”.
FPL is implemented in Java using JDOM,Saxon and Jakarta-oro.