XML based markup language and protocol in order the geographical information system (GIS) and the like with describes the spatial data which is utilized and various contents which include the information of position, between the computers this to utilize circulation mutually. The Japan Information Processing Development Center Database Promotion Center being center, being something which decides specification, G-XML 2.0 the Japan Industrial Standard (JIS) with has become as JIS X 7199. In addition, as for G-XML 3.1 OGC of the economic organization due to is standardized) with specification is standardized internationally GML which is the standard (as ISO 19136.
It reaches the point where & it can accumulating transmit with G-XML, spatial data such as map topographical data and various information contents etc which had geographical attribute, with standardized description method. Description method of the basic data has quoted the standard of GML where specification was standardized, but with G-XML handles geographical information with such as Internet releasing the service which, to the plural software and service cooperating, the case where it operates communication protocol etc in regard it is stipulated. Because of this, superposing various informations to the map data, it reaches the point where it can make the processing where it indicated, it processed combining the data of the type which differs,
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One of file compressed type. In addition, the software which offers the file compressed thawing function of GZIP type (command). To be wide it is the type which has spread with the UNIX affiliation OS. Because there is no archive function which collects the plural files to one file, it is used combining There is many a thing which “.gz” is attached to the end of file name in the file which was compressed with GZIP type.
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