Re: Where are XML types ?
Michael Kay wrote: >>Where are XML types ? >>People know xs:string, xs:int and xs:QName, because they are >>taken from >>raw data, but is there high level types for XML items such as >>xml:element, xml:attribute, or xml:namespace ? >>I have to name (with a QName) objects (that can be XML items) >>as if they >>were types. >>I really really don't think that XPath2 offers a reasonable >>solution with : >>"5 instance of xs:integer" >>". instance of element()" >>the last one frightened me :( > > > If you can come up with a better solution, please do. Unfortunately, my application is not really ready to handle such types. I can handle an xs:string, an xml:element, a my:purchase-order, but not an element(*,my:purchase-order) ; in fact, when i handle a my:purchase-order, i don't mind if it comes from an element or not ; in my application, i don't use complex types (in the sense of W3C XML Schema), i simply use objects that may have been unmarshalled from XML or not In this strange world, they all have a QName > > XML schema defines types for the *contents* of elements and attributes: when > you say that a particular node is an integer, what you really mean is that > the content of the node is an integer. This is probably the confusion that > makes it difficult to get to grips with the XPath type system. There are > actually two overlapping sets of types: the types of the nodes, and the > types of the contents of the nodes. This is why XPath uses different > notations for the two cases: element(), text(), comment() for the nodes, and > xs:integer, my:purchase-order, and so on for their contents. Then it allows > you to combine the two: element(*,my:purchase-order) is an element > containing a purchase order, and attribute(*, xs:integer) is an attribute > containing an integer. > > It takes a bit of getting used to, but it works. fine ! thanks for your answer > > Michael Kay > http://www.saxonica.com/ > > > ----------------------------------------------------------------- > The xml-dev list is sponsored by XML.org <http://www.xml.org>, an > initiative of OASIS <http://www.oasis-open.org> > > The list archives are at http://lists.xml.org/archives/xml-dev/ > > To subscribe or unsubscribe from this list use the subscription > manager: <http://www.oasis-open.org/mlmanage/index.php> > -- Cordialement, /// (. .) -----ooO--(_)--Ooo----- | Philippe Poulard | -----------------------
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