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You're right: A CSV containing only data elements and commas does not carry
the information richness of XML.
The trick is to give the CSV those capabilities in innovative ways, without
bloating it, and to use it in conjunction with (e.g., as a gateway to) XML
when processing data arrays.
From: Rick Marshall [mailto:firstname.lastname@example.org]
Sent: Monday, December 06, 2004 7:12 PM
To: Stephen E. Beller
Subject: Re: [xml-dev] Data streams
all you've done is shown that the entropy of the xml file is
significantly lower than the csv file. that would mean it carries
significantly more information and as others have pointed out, when
inspecting the xml, this is indeed the case.
put another way the correct interpretation of your experiment is that
the ratio of the compressed file sizes points to a significant
difference in information content. the csv file and the xml file aren't
the same stuff.