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Converting Simple BNF grammar to DTD or schema
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[QUOTE="Chris, post: 771260"] I have a requirement to have an XML document that consists of an arbitrarily large expression. For simplicity's sake, assume I have the following grammar: expr => term rest term => ID relop ID rest => (conjunction term) | e conjunction => AND|OR relop => EQ|NE|GT|GE|LT|LE Is it possible to convert this grammar to a DTD or schema? I've tried the following DTD without success: <!ELEMENT expr (term,rest)> <!ELEMENT term (id,relop,id)> <!ELEMENT rest ((conjunction,term)|EMPTY)> <!ELEMENT conjunction (EMPTY)> <!ELEMENT id (#PCDATA)> <!ELEMENT relop (EMPTY)> <!ATTLIST conjunction type (AND|OR)> <!ATTLIST relop type (EQ|NE|GT|GE|LT|LE)> Any pointers appreciated. Thanks in advance. [/QUOTE]
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Converting Simple BNF grammar to DTD or schema
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