On Tue, May 24, 2005 at 06:01:00PM -0400, Daniel Veillard wrote:
> By the definition of XML this is not possible. Packing multiple
> XML document on a single stream without out of band markers is a frequent
> but huge design flaws. The demonstration is obvious for anybody who
> read the 2 first pages of the XML standard:
>
> http://www.w3.org/TR/REC-xml/#sec-well-formed
>
> First production of the XML specification:
> [1] document ::= prolog element Misc*
>
> Misc* means there is no potential limit to the number of Misc element at
> the end, and not finding one is a fatal error.
And the definition of Misc is:
Misc ::= Comment | PI | S
i.e. either a comment (<!-- ... -->), a processing instruction (<? ... ?>) or
white space. That PI is further defined to _exclude_ <?xml ... ?>.
So it seems that is IS possible to determine where the next xml doc starts
just by looking for the next xml declaration or the next actual element.
> On Tue, May 24, 2005 at 02:47:12PM -0600, Sebastian Kuzminsky wrote:
> > I've got a couple of processes that trade XML messages over the network.
> > The sender writes each XML message on a single newline-terminated line.
> > The receiver uses select and read, and reads until it gets a '\n',
While I wouldn't necessarily call a design that tried to intuit where
the next doc starts broken, using a delimeter between docs does sound like
a better idea. As others have said, using \0 instead of \n will probably
work better, at least until you do something like switch to UTF-16 encoding.
eric
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