三元组的主语和谓语必须表达为uri，以便彻底明确，并且利用流行领域做这件事情的标准模式和最佳实践变得越来越成熟。
A triple's subject and predicate must be expressed as URIs to make them completely unambiguous, and standard schemas and best practices for doing this with popular domains are gaining maturity.
图形模式的第二个三元组与contributor的foaf： weblog属性对应的对象匹配。
The graph pattern's second triple matches the object of the contributor's foaf: weblog property.
在这个示例中，where子句的图形模式中的第一个三元组与foaf： name属性为“Jon Foobar”的节点匹配，并把它绑定到名为contributor的变量。
In this example, the first triple in the WHERE clause's graph pattern matches a node with a foaf: name property of "Jon Foobar," and binds it to the variable named contributor.
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