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I have an app
that saves its documents in XML format. Among other stuff, it has to save
matrices (floating point format). In order to embed binary content in an XML
document, I’m encoding the binary data in Base64. This works fine if the data
matrix is not larger than 2048x2048. With higher dimensions (e.g. 4096x4096),
the encoding/coding process takes too long and it is too memory consuming as
well.
Is there a
better approach to deal with binary content in a XML
document?
I’m considering
two options:
(1) Save the
binary information in a separate binary file, The XML file will simply include
a link to this file.
This is a good approach, except that your files won't
be self-contained.
(2) Would it be possible to save the binary
information in a CDATA section?
Nope - the data might just contain the ]]> sequence for
example.
What I can suggest is to use compression on your
matrix. zlib compression is easy to integrate in your app. Then, you
can base64-encode the compressed data. Alternatively, you can compress
both your XML and the related binary data files together in a single package to
make it self-contained. The latter solution probably creates smaller
documents.
| Ideas that fall under shadows of theories
that stand tall, thoughts that grow narrow upon being verbally
released. |
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