Xapian and Omega are independent components designed to work together to provide indexing and searching functionality. Xapian和Omega是独立的两个组件,旨在相互协作来提供索引和搜索功能。
It uses R-tree to construct spatial index for GML spatial data from GML instance document, and uses Ex-Dewey prefix encoding scheme to construct index for GML non-spatial data, they are independent but closely correlative, and together accomplish the indexing of GML data. GML实例文档中的GML空间数据采用R树构建索引,而非空间数据则基于Ex-Dewey前缀编码方案进行索引构建,二者独立又紧密关联,共同实现GML空间数据的索引。