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What if I ditched DOM and used another tool for managing the XML file; could I then insert the base64 content and still be within the XML standards? Is this a limitate of DOM? Thanks. Jerry -----Original Message----- From: Ian Graham [mailto:igraham@i...] Sent: Saturday, January 06, 2001 10:50 AM To: Dan Vint Cc: Jerry Johns; 'xml-dev@l...' Subject: Re: binary base64 definition The DOM supports access to notation nodes, but can enforce no statement aobut the proper encoding of a referenced external entity (which makes sense, as it is external to the document). Base64 encoding of content inside a document would require custom code for doing the encoding/decoding, and some attribute-based mechanism for labeling the 'type' content of the node containing the data. That is certainly possible, but as far as I can see is outside the scope of the DOM. Ian On Fri, 5 Jan 2001, Dan Vint wrote: > You can't use elements this way, but an alternative would be to create a > NOTATION type and then an external entity of this type - you would copy all > the contents of whatever should be base 64 into this external file, it > would be part of the XML document but it would be outside. Not sure if > DOM has been setup to understand NOTATIONS, but in an SGML world you would > be able to associcate a "processor" with that notation and have it called > whenever you needed to read or write that format. > > Your DTD might look like the following: > > <!DOCTYPE .... [ > > <!NOTATION base64 SYSTEM "binary base64"> > <!ENTITY extfile1 SYSTEM "extfile.b64" NOTATION "base64" > > > ]> > .... > &extfile1; > ... > > The syntax is probably not exact but you can look up the details. > > ..dan > > > > > In the DTD, can I specify a type of "binary base64" for an element so that > > when I write to the XML file using DOM, DOM will automatically encode the > > binary data for me without parsing for control characters? If so, I assume > > it will do the reverse when I read that element. > > > > Can anyone validate my assumption about the DTD data type? Has anyone seen > > an example DTD definition with this in it? > > > > Thanks much. > > Jerry > > > >
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