[Openstreetmap-dev] More on GPX schema
Frank Mohr
f_mohr at yahoo.de
Fri Sep 23 09:08:53 BST 2005
Immanuel Scholz wrote:
> Hi,
>
>
>>>my point is just that predefined keys as part of the XML namespace
>>>are easier to handle
>
>
> Well, I fail to see the difference in complexity writing a parser for
it makes no difference in syntax but in semantics
(easier by doing some semantic checks already in the syntax parser)
to keep Nicks example:
if we define <foot> as a part of the <permissions> namespace,
a <pedestrian> tag would be a syntactical error
if we define just a <permission key/value> tag,
<permission key="foot"> and <permission key="pedestrian"> are both
syntactically correct, but must be checked for semantic errors
in a second parser
frank
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