| 摘要 |
Style sheets which define the expression form, etc., of documents in a meta-language (for example, XML) format in which tags which can be defined arbitrarily are used are managed appropriately. A style sheet is given a unique style ID. Since a receiving system is capable of storing style sheets separately from XML documents and managing them, it is unnecessary to add a style sheet to each XML document body and to transmit it, and thus the amount of the data to be transmitted can be reduced. Also, it is possible to protect the style sheets from unauthorized use by attaching key data to the XML document body, so that the style sheets can be managed as authored works. Furthermore, by specifying the other party or by providing a device for performing authentication, limited use of the style sheet becomes possible.
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