This paper describes a product data model as a product structural tree that is composed of data objects and relation objects, and expresses the product structural tree as a matrix.

将产品数据模型表示为包含数据对象和关系对象的树状结构，并用矩阵的形式加以描述。

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Figure 5 defines a custom document model on the basis of the product data (refer to Listing 1).

图5针对产品数据(参见清单1)定义了一个定制文档模型。

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Data modelers might argue that if you want the model to have more data, grow the model, then create schemas as a by-product-in effect, create a bigger model and restrict down as needed.

数据建模人员也许认为如果想让模型包含更多数据、扩展模型，那么可以根据产品创建模式—实际上，在需要时创建更大的模型并减少限制。

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But if I were doing a business model for broadsheets and broadcast networks I'd say: Fact and data are our product, we're putting everything into reporting, that's what we're selling, interpretation is the reader's job, and think pieces are for the edit page where we put the hardy, blabby hacks.

WSJ: Open Mic Night at MSNBC