This software is a viewer for MS Visio documents in XML format, in which all the functions are coded in Java language so that it is platform_independent, and are encapsulated into a component so that the software can easily be integrated with any other Java_based application. Of course, the component can also be programmed as an individual application which serves as a pure Viewer for MS Visio XML Documents, in a platform_independent way. This software mainly consists of 5 parts: 1) A Parser for Visio XML documents. Based on the XML Schema for MS Visio, it can read and analyze the components and objects in a Visio XML document; 2)A Convertor. By abandoning some components and objects in a Visio document which are generally unuseful for the output processing such as the ICON objects, and by carrying on other converting tasks to reduce the depth of document tree, the convertor can generate a new document with the compressed size, improved parsing efficiency, and enhanced convenience for dispatching and delivering on the network, compared to the original document; 3)A Library which encapsulates the necessary meta_graph objects. The Objects in the library are corresponding with those in the original Visio document structure, but are reconstructed with Java. 4) A Palette Library which encapsulates the objects to carry out the output processing for different devices, such as screen, printer or plotter, and other objects to make some transformation such as drag & drop, translation, rotation, shear, zooming and symmetric. 5) An Interface Repository, which includes the document_interface objects, event_interface objects, coordinates_interface objects and palette_interface objects. They can be used to realize the integration with other Java_based applications. The software can be used in two ways. Firstly, the component of this software can be embedded into other Java_based applications. Secondly, it can serve as a pure Viewer for MS Visio XML Documens.