| Summary: | 碩士 === 淡江大學 === 資訊管理學系碩士班 === 93 === In this paper, the structure of XML documents is analyzed, and its tree model is proposed. Based on the model, the functions of an XML editor on displaying and editing are explored. And a Tree editor for XML documents are designed and implemented.
On displaying, all the tedious tags and white spaces for indent are removed. The user can select the types of nodes to display, maximize/minimize a sub-tree, and use the local scrolling bar of a sub-tree.
On editing, the concept of current working tree (CWT) is proposed. While the text cursor is located in node data, the unit of editing is a character or a line. While it is located between next-level sub-trees, the unit of editing is a next-level sub-tree. Elementary editing actions must base on the unit of editing. When the cursor enters or exits a sub-tree, the CWT will shrink or expand respectively. Since the unit of editing changes as well as the CWT, the tree structure of a document will be well preserved. Besides, special editing actions such as pushing down, pulling up, markup labeling, and markup transformation are supported by our tree editor.
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