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[db-wg] [opensource-wg] Question for RPSL Parser

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Nick Hilliard nick at inex.ie
Thu Aug 20 14:36:40 CEST 2015

On 20/08/2015 13:11, Stavros Konstantaras wrote:
> What my prototype does now is extract the attributes and values by using
> Regular Expressions

rpsl is afaik a chomsky type 1 or 2 grammar and regular expressions are a
chomsky type 3 grammar.  Not wanting to rain on anyone's parade, you cannot
parse a type 1 or type 2 chomsky grammar with a type 3 grammar.

It's a bit like this, except worse:

> http://stackoverflow.com/questions/1732348/regex-match-open-tags-except-xhtml-self-contained-tags

A partial solution is obviously possible, however it will only ever be an
approximation.

Nick

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