图6显示了一个更新过的持久性模型，用于将整个类层次结构映射成一个数据实体。
Figure 6 presents the updated persistence model for mapping the entire class hierarchy into one data entity.
模型由包括有一整套特征节点的树图组成，构成一类金字塔结构的广义语义网络。
The model is a graph including a set of feature nodes which forms a generalized semantic net with a pyramid-like structure.
模型由包括有一整套特征节点的树图组成，构成一类金字塔结构的广义语义网络。
The model is a graph including a set of feature nodes which forms a generalized semantic net with a pyramid-like structure. The feature resolution increases as the pyramid levels propagating down.
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