How to use binary data with XML?
cowan at locke.ccil.org
Tue Apr 20 21:09:22 BST 1999
Roger L. Costello wrote:
> (1) Binary data isn't actually put in an XML file, correct? i.e., the
> binary data is _not_ inline, correct? An XML file just contains ASCII
> text, correct?
Correct in essence. However, for "ASCII" read "characters,
expressed in Unicode or some subset of it". Of course, ASCII
*is* a subset of Unicode.
> (2) Just like in HTML, binary data is _referenced_ by the XML document,
Typically. Nothing prohibits you from encoding binary data as
Base64 and incorporating it into an XML document, but nobody has
converters for that yet either.
> (3) Is this the correct way of using binary data:
> Here we see an XML document _referencing_ a file containg binary data.
> The binary data is not actually inline. Is this how it's done?
That is the fully standards-compliant way. Application conventions
such as XLink (when it stabilizes) can simplify this process
by allowing in-line URIs and letting the network infrastructure
provide the remote document-type.
John Cowan http://www.ccil.org/~cowan cowan at ccil.org
You tollerday donsk? N. You tolkatiff scowegian? Nn.
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