[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] RE: increment pattern for an attribute..
Well, now I am! Thanks for the tip. Appreciate it. +D --- Michael Kay <mike@s...> wrote: > > > > > I use W3C XML schema language 1.0. > > Well, I assumed you were aware that what you are > asking for is well beyond > the expressive power of XSDL 1.0. > > Michael Kay > http://www.saxonica.com/ > > > > > > --- Michael Kay <mike@s...> wrote: > > > > > You don't say what technology you are using to > define the > > schema. But > > > let's assume it's XSDL 1.1 with assertions (and > with no > > limits on the > > > XPath syntax allowed in assertions) - as > implemented in Saxon 9.0. > > > > > > Then I think you can do it with > > > > > > <xs:complexType name="type-of-data-element"> > > > ... > > > <xs:assert test="e1[1]/@val=20 and > > > every $e in e1[position()>1] satisfies $e/@val > = > > > $e/preceding-sibling::e1/@val + 1"/> > </xs:complexType> > > > > > > I'm not sure this is quite right according to > your description - > > > perhaps you allow gaps in the numbering > sequence. In that case > > > it's: > > > > > > <xs:assert test="e1[1]/@val=20 and > > > every $e in e1[position()>1] satisfies $e/+@val > > > > > $e/preceding-sibling::e1/+@val"/> > > > > > > (The odd little "+" signs are a quirky way of > forcing > > conversion to a > > > number in XPath 2.0) > > > > > > Give it a try and let us know if it works. > > > > > > Michael Kay > > > http://www.saxonica.com/ > > > > > > > > > > > I need to define the schema for "val" > attribute in > > > the below XML: > > > > > > > > <data term="EXP"> > > > > <el val="20"> > > > > <ch> some data </ch> > > > > </el> > > > > <el val="21"> > > > > <ch> some data </ch> > > > > </el> > > > > .....similarly for val=22,23,24,....N </data> > > > > > > > > <data term="SUPP"> > > > > <el val="20"> > > > > <ch> some data </ch> > > > > </el> > > > > <el val="21"> > > > > <ch> some data </ch> > > > > </el> > > > > .....similarly for val=22,23,24,....N </data> > > > > > > > > Here, am more interested in the "val" > attribute of > > > "el" > > > > element. What is the Specific schema for "val" > > > > attribute which satisfies the following > > > conditions: > > > > 1. allowed values for "val" are 20,21,22,..... > N > > > (no limit on > > > > N although it's typically < 100.) 2. "val" > always > > > begins with > > > > 20 in each "data" element scope. > > > > 3. "val" must be in ascending order > > > (20,21,22...etc) 4. "val" > > > > must be unique in each "data" element scope. > > > > __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
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