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How to Analyze Graph-Based Models - Www-st.inf.tu-dresden.de ...

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Fir<strong>st</strong> I<strong>de</strong>a<br />

► Write a context free grammar for the tax <strong>de</strong>clarations<br />

► From that, <strong>de</strong>rive a XML schema<br />

■ Enrich the grammar nonterminals with attributes<br />

► Check context free <strong>st</strong>ruc<strong>tu</strong>re of the tax <strong>de</strong>clarations with the XML<br />

parser (contextfree consi<strong>st</strong>ency)<br />

► This is usually assured by the tax form<br />

■ It is, however, nevertheless necessary, if the forms have been fed in<<strong>st</strong>rong>to</<strong>st</strong>rong> a<br />

computer, <<strong>st</strong>rong>to</<strong>st</strong>rong> avoid feeding problems.<br />

Prof. Uwe Aßmann, Softwaretechnologie II<br />

80

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