Hi Songsong,
This is not entirely on topic but you may be interested in my work on
XML
description for waveforms. See http://sdrphy.org
I know some VT folks are using it for their cognitive radio research.
We
implemented a really basic interpreter to configure a predefined GRC
design based on the XML. THe flow is:
GRC → XML description of the flowgraph
SDRPHY → interpreter > modify the GRC flowgraph using search/replace
GRC → load modified flowgraph XML and generate the .py code
Eugene