Hi Ted, nice analysis.

Ted Thibodeau Jr wrote:
> I've just dug into the file in question, and there are 8 URIs
> causing this sort of trouble, all in the ?o position, each in
> a single triple.
>   
Are you using 3.1?  I found ~16 using
grep "<http[^>]*<[^>]*>" filename
> These are errors, and should be tidied up in the sources.
>   
Indeed. 
> In the current case, your sample URI --
>
>    <http://www.sample.com<dogs>
>
>  -- is invalid, not simply because it contains the left angle bracket
> "<" -- which *is* permitted in a general sense -- but because of
> *where* that character is found.
>   
Good point.

It seems that Virtuoso doesn't like the following either, which I'm
guessing should be legal (although I'm not placing any bets!):

<http://www.sample.com/#<dogs>

So the issue remains that Virtuoso and Jena don't like "<" in the URIs. 

> Maybe we need some URI validation tools, to start with...
>   
I'll second that! 


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