XML (extensible markup language) compressing method and device based on flexible-length identification codes

Abstract

The invention relates to the technical field of data business, in particular to an XML (extensible markup language) compressing method and device. The compressing method uses flexible-length identification codes to replace the elements and attributes in an XML file, and the XML file with large amount of elements and attributes can be compressed efficiently with low load. The method includes: defining one flexible-length identification code, corresponding to each element of the XML file, in a data dictionary; defining one flexible-length identification code, corresponding to each attribute of the XML file, in a data dictionary; by a transmitting party, replacing the elements and attributes in the XML file one by one with the corresponding flexible-length identification codes defined in the data dictionary so as to realize replacement compression of the XML file; by a receiving party, replacing the flexible-length identification codes of the received compressed XML file with the elements and attributes corresponding to the flexible-length identification codes and defined in the data dictionary to realize decompression of the XML file.

Description

technical field [0001] The invention relates to the technical field of data services, in particular to an XML compression method and device. Background technique [0002] Extensible Markup Language (XML, Extensible Markup Language), as a cross-platform standard data exchange format, is widely used in digital book format representation, data exchange and storage, and is currently a powerful tool for processing structured document information. Because XML documents contain a large number of repeated tags and structural information, XML documents contain a large number of repeated tags and structural information, which increases the cost of storage and transmission, and hinders the development of XML applications to a certain extent, especially in This is especially true on mobile devices with limited bandwidth and resources. Therefore, XML files need to be compressed in many applications such as mobile reading of digital books. Although XML documents can be compressed using ...

AI Technical Summary

Problems solved by technology

The above method can compress XML documents at high speed, but since the number of bits allocated to element names is only 5 bits, it can only represent 32 element names at most; the number of bits allocated to attribute names is only 6 bits, and it can only represent 64 at most Attribute names, which are far from enough in the representation of layout e-books, because layout e-books often need to represent hundreds of element names and attribute names to represent the geometric layout structure and logical layout structure of documents

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