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## A Pictoral view and dtd for the sequence element

We give a pictoral view of a presentation for a vector object,
together with a linking mechanism between the sequence element and the
semantic template.

We also give a DTD for the sequence element.

In the pictoral view, we have the following meanings:
- B
_{L} and B_{H} are the lower and upper bounds
for the iteration respectively
- x is the identifier which the parameter links to
- Body(x) is the
*pseudo* presentation MathML which must be
repeated
- vector(Sequence) is the semantic template.