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I agree, its is quite possible to create binary parsers with a SAX interface ie: interoperability on a higher level than the XMLtext format level. Interesting to hear about MPEG7. are there any work being done on BinML there ? Any links that migth be interesing ? Claude Seyrat wrote: > Dear All, > > It seems to me that a debate "binary format vs textual format" > is irrelevant. It is clear that none of them is the perfect format. > Both binary and textual have their pros and cons. > > XML defines a very powerfull and generic framework for managing and > processing structured information: very simple APIs (SAX, DOM, etc..), > generic query language (XQuery), locators (XPath), transformations > (XSL-T). New concepts are emerging like infosets which, among other > thing, clarifies the notion of validation and typing, etc.. > > In certain environment, like broadcast or handheld, CPU, memory and > network ressources are very expensive. For instance, in the multimedia > indexing domain, there are applications which need very large > structured AV metadata stream (might become as large as a video > stream) with very strong constraints in terms of compression, > filtering and streaming. A textual format would in these cases be > a terrible burden. However, it would be very damageable to forbid > interoperability with XML environments. > > Therefore, binary formats will continue to exist. The new challenge > is not to replace one format or the other, but to make them as > compatible as possible. It should be very easy to switch from one > format to an other. The effort spend to design an XML language should > be reused for the binary format. Finally, a "text-designed > application" should be easily adapted to deal with a binary format. > > When designing MPEG-7, the following policies have been adopted: > - to stay as close as possible to the XML spirit by the adoption > of a textual version designed with XML Schema, > - to define a binary format that uses XML Schema definition to > generate an efficient encoding scheme, > - to allow one to decide whether he wants to use binary or textual > format. > > Since the beginning, MPEG-7 has been XML driven. The MPEG-7 community > is very reluctant to follow another development path. However in > MPEG-7 everybody recognizes the need for a binary format. > > Best regards, > Claude. > > -- > ______________________________________________ > > Claude Seyrat > > Expway c/o Acland > 18 avenue Georges V > 75008 Paris > tel: 33 1 56 62 11 05 > fax: 33 1 56 62 11 11 > mail: claude.seyrat@e... > > ------------------------------------------------------------------ > The xml-dev list is sponsored by XML.org, an initiative of OASIS > <http://www.oasis-open.org> > > The list archives are at http://lists.xml.org/archives/xml-dev/ > > To unsubscribe from this elist send a message with the single word > "unsubscribe" in the body to: xml-dev-request@l...
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