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Then the specified space is opened, else the specified space is closed
End of judgment.

5. SUMMARIES AND CONCLUSION
In this paper, we proposed the important items at the upstream design stage and shows the expressions
based on the principal architecture and its extension. Thus, proposed architecture is extensible and can
transmit the design information and intention from the upstream to the downstream design stage. In
the upstream design stage, shape and positioning are very simple or vague. To handle this information,
we introduced the migratory information and proposed the expression of relative positioning and
functions. To handle this information and to transmit this information to the downstream design stage
is very effective to achieve the main design intention.

Moreover, it is proposed the treatment of spaces, especially the classification of the space and the
judgment of the space state. In the actual design process, it is very important to transmit design
information and intention from the upstream design stage to the detailed design stage. This is very
important and effective not only the efficiency (reduction of design error or redo), but also for
achieving the product concept and the main customer requirements.

The proposed architecture is extensible and accurate to transmit the design information. This
architecture is one of the effective approaches to support the design process with the design
information and intention.

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