Tag document compression apparatus and restoration apparatus, compression method and restoration method, compression / decompression apparatus and compression / decompression method, and computer-readable recording medium recording a compression, decompression or compression / decompression program

摘要

In a tag document compressing/decompressing technique, a tag document compressing apparatus (2), for example, has a tag extracting unit (30) for scanning document type definition of an inputted tag document to extract a tag, a tag code table creating unit (40) for assigning a predetermined code to the tag in the document type definition on the basis of the tag extracted by the tag extracting unit (30) to create a tag code table, and a tag coding unit (60) for coding the tag in document instance on the basis of the tag code table created by the tag code table creating unit (40) so as to compress the document in consideration of the tag in the tag document, thereby improving a compression rate of the tag document and decreasing a quantity of data of the same. IMAGE