Thanks for all the info; I now understand what is going on.
On Fri, Oct 15, 2010 at 7:31 AM, Chris Lilley <[email protected]> wrote: > On Friday, October 15, 2010, 11:03:26 AM, Radu wrote: > > RC> Hi Tim, > > RC> W3C describes the content of a <svg> document in a schema-independent > way. > RC> From what I know there are also XML Schemas which can be used to > RC> validate SVG files. > > Yes. > > Going forward, W3C plans to use RelaxNG to define the SVG grammar (and to > recommend NVDL for portioning out a multi-namespace document such that the > SVG parts are validated to the SVG RNG). > > RC> Indeed the usual way to validate a SVG file is by using the DTDs but > DTD > RC> as a grammar specification is not namespace aware and understands > RC> constructs like "xmlns:x" as usual attributes. > > Yes. > > It should not, but DTDs predate namespaces and are not aware of namespace > declarations. > > RC> Radu Coravu > RC> <oXygen/> XML Editor, Schema Editor and XSLT Editor/Debugger > RC> http://www.oxygenxml.com > > RC> On 10/14/2010 6:00 PM, Reaves, Timothy wrote: > >> I'm confused then. From > http://www.w3.org/TR/SVG/struct.html#SVGElement > >> they reference to follow what is outlined > >> http://www.w3.org/TR/2006/REC-xml-names-20060816/#ns-decl . > > >> " > > >> An example namespace declaration, which associates the namespace prefix > >> *edi* with the namespace name > >> |http://ecommerce.example.org/schema|<http://ecommerce.example.org/schema%7C> > : > > >> <x xmlns:edi='http://ecommerce.example.org/schema'> > >> <!-- the"edi" prefix is bound tohttp://ecommerce.example.org/schema > >> for the"x" element and contents --> > >> </x> > > >> " > > Yes, that is fine. > > >> So the W3C is recommending something that is invalid? > > No. Its only invalid if using a substandard validation mechanism (DTDs). > Namespace-aware schema languages such as W3C XML Schema or RelaxNG have no > problem with namespace declarations. > > The definition of a conforming SVG fragment is here > http://www.w3.org/TR/SVG/conform.html#ConformingSVGDocuments > > If you want to use extensions in other namespaces and also want the > instances to be DTD valid, this part of the SVG specification explains how > to do that > http://www.w3.org/TR/SVG/extend.html#PrivateElementsAndAttribute > > Lastly, if using SVG files generated by Adobe Illustrator, it is wise to > check the output settings and ensure that the 'round trip' option is not set > (it includes an entire, base64-encoded PDF file into the SVG) and to ensure > that any Adobe extensions are > a) desired > b) actually used > Often, namespace declarations will be present but not actually used. > > A useful program to take SVG generated by various authoring tools and tidy > it up is Scour > http://www.codedread.com/scour/ > > > > >> On Thu, Oct 14, 2010 at 10:56 AM, Radu Coravu <[email protected] > >> <mailto:[email protected]>> wrote: > > >> Hi Tim, > > >> I will assume that the entities like "&ns_ai;" used in the attribute > >> values are defined in the DTD declaration used to validate the SVG > file. > > >> The problem is that SVG files are validated against DTD grammars. > DTD is > >> not namespace aware, it sees namespace binding attributes like > "xmlns:x" > >> like simple attribute names which need to be declared in the DTD in > >> order to be recognized. > > >> For example in the DTD used by default by Oxygen to validate DTDs > the > >> <svg> root element is defined as having the following attributes: > > >> <!ATTLIST svg > >> xmlns CDATA #FIXED "http://www.w3.org/2000/svg"; > >> xmlns:xlink CDATA #FIXED "http://www.w3.org/1999/xlink"; > >> %stdAttrs; > >> %testAttrs; > >> %langSpaceAttrs; > >> externalResourcesRequired %Boolean; #IMPLIED > >> class %ClassList; #IMPLIED > >> style %StyleSheet; #IMPLIED > >> %PresentationAttributes-All; > >> viewBox %ViewBoxSpec; #IMPLIED > >> preserveAspectRatio %PreserveAspectRatioSpec; 'xMidYMid meet' > >> zoomAndPan (disable | magnify) 'magnify' > >> %graphicsElementEvents; > >> %documentEvents; > >> version %Number; #FIXED "1.0" > >> x %Coordinate; #IMPLIED > >> y %Coordinate; #IMPLIED > >> width %Length; #IMPLIED > >> height %Length; #IMPLIED > >> contentScriptType %ContentType; "text/ecmascript" > >> contentStyleType %ContentType; "text/css" > > > >> So if you do not add an attribute definition for "xmlns:x" in the > >> attributes list, the DTD will think the attribute is undefined. > > >> Regards, > >> Radu > > >> Radu Coravu > >> <oXygen/> XML Editor, Schema Editor and XSLT Editor/Debugger > >> http://www.oxygenxml.com > > >> On 10/14/2010 4:50 PM, Reaves, Timothy wrote: > >> > I have an SVG document where the openeing SVG element is: > >> > <svg version="1.0" xmlns:x="&ns_extend;" xmlns:i="&ns_ai;" > >> > xmlns:graph="&ns_graphs;" xmlns="&ns_svg;" > xmlns:xlink="&ns_xlink;" > >> > width="497.611" height="591.554" viewBox="0 0 497.611 > 591.554" > >> > style="overflow:visible;enable-background:new 0 0 497.611 > >> 591.554;" > >> > xml:space="preserve"> > >> > > >> > > >> > Validation fails on each of the xmlns attributes. This should be > >> valid. > >> > The errors look like: > >> > SystemID: /home/bv6679/Development/images/HSVG/99571_97YA_17.svg > >> > Engine name: Xerces > >> > Severity: error > >> > Description: Attribute "xmlns:x" must be declared for element > >> type "svg". > >> > Start location: 29:21 > >> > End location: 29:42 > >> > > >> > Any ideas? > >> > _______________________________________________ > >> > oXygen-user mailing list > >> > [email protected] <mailto:[email protected]> > >> > http://www.oxygenxml.com/mailman/listinfo/oxygen-user > > > >> _______________________________________________ > >> oXygen-user mailing list > >> [email protected] <mailto:[email protected]> > >> http://www.oxygenxml.com/mailman/listinfo/oxygen-user > > > > > RC> _______________________________________________ > RC> oXygen-user mailing list > RC> [email protected] > RC> http://www.oxygenxml.com/mailman/listinfo/oxygen-user > > > > -- > Chris Lilley Technical Director, Interaction Domain > W3C Graphics Activity Lead, Fonts Activity Lead > Co-Chair, W3C Hypertext CG > Member, CSS, WebFonts, SVG Working Groups > > _______________________________________________ oXygen-user mailing list [email protected] http://www.oxygenxml.com/mailman/listinfo/oxygen-user
