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Graphics Interchange Format  |  1995-12-29  |  80KB  |  545x279  |  8-bit (161 colors)
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OCR: Invoice Commercial Retail FIGURE 6 As shown here, you can split entities to avoid nulls. Note that the relationship between Commercial and Retail and Invoice is exclu- sive. (One occurrence of Invoice can associate with one occurrence of Com- mercial or with one occurrence of Retail, but not with both.)