[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: A question for parsing experts: How to recognize that'<' d
On Tue, 16 Feb 2021 at 20:05, Roger L Costello <costello@mitre.org> wrote: > > Hi Folks, > > Suppose you are scanning an XML document or HTML document from the first character to the last character. > > In the scanning process, you encounter a less than ( '<' ) symbol. > > You must determine if it denotes the beginning of a start tag. > > What checks must be made to make this determination? > > I think these are the checks: > > Let c = the character currently being examined. > Let nextchar = the character following c > > if c == '<' and nextchar != '/' and nexchar != '!' and nextchar != '?' then we are at the beginning of a start tag > > Do you agree? Am I missing any checks? > > /Roger > In XML you also need to account for the < being in a CDATA section or comment or processing instruction or local subset of the DTD all of which can contain a < matching your description that does not start a tag. In HTML then it's ... more complicated. David
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