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Murata Makoto wrote: > > Here is an example in an XML-like notation. > > <para>* . @secContent ((<sec>@secContent<sec>) ^ @secContent) thanks. > > The semantics of <sec>@secContent<sec> is "a section containing a > substution variable @secContent". i follow this. > > The semantics of ((<sec>@secContent<sec>) ^ @secContent) "a section > containing a section containing ... a section containing a > substution variable @secContent". this one is beyong me. > > The semantics of the entire expression is "generate a section > which matches ((<sec>@secContent<sec>) ^ @secContent) and replace > @secContent with paragraphs". > > For each hedge regular grammar (e.g., descriptions in RELAX or TREX), > there exists a hedge regular expression that represents exactly > the same set of hedges. Conversely, for each hedge regular expression, > there exists a hedge regular grammar that represents exactly > the same set of hedges. > interesting. this would seem a fruitfull area for continued research and development (e.g. examplotron x.x) -Jonathan
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