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To
be open standard, not proprietary to Adobe
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Constrained
for sustainability
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No
encryption (transparency, technical protection)
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No
audio or video embedded
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No
Javascript or executable file launches
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All
fonts must be embedded and also must be legally embeddable
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for
unlimited, universal rendering (disclosure, self-documentation)
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Colorspaces
must be specified in a device independent manner
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(external
dependencies)
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Embedded
metadata must be in XMP -- XML-based
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(transparency,
self-documentation)
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LC
& other DLF participants involved in development
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