这个搜索引擎的最关键的一点就是对本体论的强大应用，类似于标签的概念，制作用户和搜索item的通用词表。
The key point about this particular recommendation engine is its strong use of an ontology, similar in concept to tags, to develop a common vocabulary for items and users.
这个搜索引擎的最关键的一点就是对本体论的强大应用，类似于标签的概念，制作用户和搜索item的通用词表。
The key point about this particular recommendation engine is its strong use of an ontology, similar in concept to tags, to develop a common vocabulary for items and users.
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