Re: [xml-dev] RE: The universality of "single starting point"

On Nov 23, 2013 12:02 PM, "David Lee" <[email protected]> wrote:

XML doesnt always start with the root element.

http://www.w3.org/TR/REC-xml/


[1]     document           ::=           prolog element Misc*

It starts with an *optional* prolog.



----------------------------------------
David A. Lee
[email protected]
http://www.xmlsh.org

-----Original Message-----
From: Costello, Roger L. [mailto:[email protected]]
Sent: Saturday, November 23, 2013 11:51 AM
To: [email protected]
Subject: [xml-dev] The universality of "single starting point"

Hi Folks,

1. Formal grammars require that a single symbol be the starting point for all productions. For example, the starting symbol is S in this grammar:

        S -> a Q a
        Q -> ...

2. Structured programming tells us that every function should have a single entry point.

3. XML has a single starting point - the root element

Wow! I see this concept of a single starting point everywhere I look. Above I have provided three occurrences. Would you provide other occurrences please?

/Roger

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