求得的语句，也被称为 三元组（triple），被自动添加到 RDF 数据库（被称作 模型）中，或从其中删除。

The resulting statements, also known as triples, are automatically added and removed from the RDF database (known as the model).

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同样的SPARQL查询所能包含的内容可以来自于关系数据库、REST服务、本地rdf三元组仓库(triplestores)、以及如今的文档。

The same SPARQL queries can include content contributed by relational databases, REST services, native RDF triplestores and now documents.

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pyRXP的元组树数据结构。

PyRXP's tuple tree data structure.

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