Compression/decompression of tags in markup documents by creating a tag code/decode table based on the encoding of tags in a DTD included in the documents

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