[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: Combining float/string to specify value/units
- From: Rick Jelliffe <email@example.com>
- To: firstname.lastname@example.org
- Date: Tue, 27 Mar 2001 00:49:08 +0800
From: Steve Rosenberry <email@example.com>
> Is the validation of primitive datatypes built into validators
> and not dependent upon a second XML Schema declaration?
Yes. And not just the "primitive" datatypes, but also the
"built-in derived types" as well.
There is a "Schema for Schemas" in the proposed recommendation.
But you should not expect schema processors to use it explicitly:
it is the schema that is built-in to a schema processors.
A schema processor checks more than just whether some data
conforms to regular expression. While datatypes do have such
"lexical spaces" they also have "value spaces", where a number
is checked as a number. (Because of these value spaces, one cannot
really bootstrap an XML Schema implementation very nicely
from string-matching-only primitives.)