[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Relative Namespaces
Sorry if this question seems to have an obvious answer-- I just can't seem to pin it down: In the namespace spec [1] I read: "A default namespace is considered to apply to the element where it is declared (if that element has no namespace prefix), and to all elements with no prefix within the content of that element. If the URI reference in a default namespace declaration is empty, then unprefixed elements in the scope of the declaration are not considered to be in any namespace." ...and lower... "The default namespace can be set to the empty string. This has the same effect, within the scope of the declaration, of there being no default namespace." ...But in the Schema spec [2] I read:... "Since the empty string is a legal (relative) URI reference, supplying an empty string for targetNamespace is not the same as not specifying it at all. The appropriate form of schema document corresponding to a schema whose components have no {target namespace} is one which has no targetNamespace attribute specified at all." ...And in the DOM Level 2 [3] Spec I read:... "DOM Level 2 doesn't perform any URI normalization or canonicalization. The URIs given to the DOM are assumed to be valid (e.g., characters such as whitespaces are properly escaped), and no lexical checking is performed. Absolute URI references are treated as strings and compared literally. How relative namespace URI references are treated is undefined. To ensure interoperability only absolute namespace URI references (i.e., URI references beginning with a scheme name and a colon) should be used. Note that because the DOM does no lexical checking, the empty string will be treated as a real namespace URI in DOM Level 2 methods. Applications must use the value null as the namespaceURI parameter for methods if they wish to have no namespace." ...And finally in the Infoset Spec [4] I read:... "Furthermore, this specification does not define an information set for documents which use relative URI references in namespace declarations. This is in accordance with the decision of the W3C XML Plenary Interest Group described in [Relative Namespace URI References]. Thus the value of a [namespace name] property is always an absolute URI with an optional fragment identifier. " ====== Therefore I ask: Where are we wrt to relative namespaces today-- sepcifically "". I know that relative namespace use was deprecated [5] but why do the DOM Level 2 and XML Schema specs still include the use of relative namespaces when they were released after the deprecation decision? [1] http://www.w3.org/TR/REC-xml-names/#defaulting [2] http://www.w3.org/TR/xmlschema-1/#declare-typesElementsAttributes [3] http://www.w3.org/TR/DOM-Level-2-Core/core.html#Namespaces-Considerations [4] http://www.w3.org/TR/xml-infoset/#intro [5] http://www.w3.org/2000/09/xppa Thanks, Jeff Rafter
|
PURCHASE STYLUS STUDIO ONLINE TODAY!Purchasing Stylus Studio from our online shop is Easy, Secure and Value Priced! Download The World's Best XML IDE!Accelerate XML development with our award-winning XML IDE - Download a free trial today! Subscribe in XML format
|