Xiaoji Lan

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GML specification provides a set of core schemas. Users can define their own GML application schemas flexibly by using GML core schemas and schema components. However, due to this flexibility, schema structure becomes more complicated. Furthermore, due to the complexity and immensity of the spatial data, new requirements for the GML data processing software(More)
Based on the study of XML documents storage in Oracle XML DB, this paper conducts a research on extending Oracle XML DB to store and manage GML documents. Meanwhile, owing to the defects that the XML DB cannot support the spatial index, an external R-Tree index is added to Oracle database to improve the efficiency of GML spatial query and operation. At the(More)
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