Article:		Binary XML, Again
Subject:		Binary Vs GZIP
Date:		2003-08-14 23:15:29
From:		Eric Rehm
Response to: Binary Vs GZIP
Kendall seems to have completely forgotten about streaming XML applications, e.g., bandwidth sensitive streaming of XML metadata within an MPEG-2 transport stream. The requirements here have been carefully analyzed by MPEG and resulted in the MPEG-7 TeM (Text Mode0 and BiM (Binary Mode). Both allow a decoder to implement a parser that can skip elements (e.g., for forward compatibility, SAX, etc.) without waiting for receipt of an entire "document" which can be gunziped. Further, MPEG-7 TeM and BiM allows for incremental building and updating of an infoset. MPEG-7 BiM, of course, allows for compression that meets the broadcaster's requirements to us as little bandwidth as possible for metadata. Should you scoff at MPEG-7 BiM, note that there is nothing about BiM that is tied to MPEG-7 per se. BiM can be used with any XML Schema. See www.expway.fr for more info. /eric rehm Singingfish / Thomson Seattle, WA

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