Re: [graphviz-interest] Is DOT syntax ambiguous re node names and subgraph names?

Hi Emden

Excellent. Thanx.

On 20/11/14 08:36, Emden R. Gansner wrote:
> On 11/18/14 6:10 PM, Ron Savage wrote:
>>
>>
>> Am I correct in thinking the attached (previous email) shows a
>> situation where, to disambiguate, dot (by convention) takes 'one' and
>> 'cluster_four' as node names rather than subgraph names?
>>
>> Is the decision documented somewhere? I couldn't see it on
>> http://www.graphviz.org/content/dot-language.
>>
> That's specified by the grammar in the subgraph production. A subgraph
> can have only one of three forms:
>
>   {...}   // totally anonymous
>   subgraph { ... }   // still anonymous but with syntactic sugar so it's
> clear it's a subgraph
>   subgraph ABC { ... } // named subgraph
>
> so the line
>> one { two -> three }
> is interpreted as a node whose name is "one", and an anonymous subgraph
> containing the two nodes "two" and "three" and an edge
> between them.
>
>      Emden

-- 
Ron Savage - savage.net.au
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