xml-dev - Re: Binary Data

["Kerry Coffin" <k_coffin@conknet.com>]

What is Base64?

Regards,
Kerry Coffin
Environmental Systems Research Institute (ESRI)

-----Original Message-----
From: Rick Jelliffe <ricko@allette.com.au>
To: Michael Emmel <mike@jmaca.com>; xml-dev@ic.ac.uk <xml-dev@ic.ac.uk>
Date: Friday, February 20, 1998 9:44 PM
Subject: Re: Binary Data


>
>
>From: Michael Emmel <mike@jmaca.com>
>
>
>
>>Is it possible to include binary data in a XML document  and follow the
>>spec.
>
>
>It is possible to have binary data in an XML *document* but it is not
>possible
>to have (unencoded) binary data in an XML text *entity*.  A document is
>constructed from entities. An entity is usually a file. An entity is either
>text
>or binary (NDATA) but not both.
>
>You can use Base64 encoding to stick non-text data inside elements:
>
><!DOCTYPE foo [
><!NOTATION base64 SYSTEM "put URL of base 64 code here, or omit this
string"
>...
>]>
><foo>
>...
><binary-data notation="base64">...</binary-data>
>...
></foo>
>
>
>CDATA marked sections are only a shorthand mechanism for data which has a
>lot of
>"&" or "<" characters which you might find tedious to delimit into entity
>references.
>It is not a mechanism for embedding raw binary, per se.
>
>Rick Jelliffe
>
>
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