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Benefits
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latter
steps can be performed on preliminary results (e.g.
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formatters
for presentation view)
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using
the same filters in multiple process phases
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unique
and constant data access path througout the process
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improvements
in the process do not require new DTD
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only
one DTD to manage
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Drawbacks
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data
model for each
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process
phase must be
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defined
outside of the DTD
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actually
no formal method
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available
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