该模型简单灵活、可扩展性好，并且相对于一般的数据交换模型更具有安全保障。
The model is simple, flexible, extensible, and more secure than other models of data exchange.
提出了基于GML空间数据交换和基于SVG的信息可视化模型。
The GML-based spatial data exchange model and SVG-based information visual model are proposed.
提出了基于GML空间数据交换和基于SVG的信息可视化模型。
The GML-based spatial data exchange model and SVG-based information visual model are proposed.
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