We use holdings data in ranking algorithms, which aggregates selection choices of libraries.
我们在排序的算法中使用馆藏数据，这样可以聚集读者借书的选择。
2
Instead, it should reside in its own project or in a project that aggregates a number of other common concerns.
相反地，它应当存在于其所拥有的项目中或者聚集了大量其他共同关注的项目中。
3
Another side effect to this scenario is that any form of materialization (pre-calculated aggregates) in the database may be ignored since no fact is included in the query.