Autodesk 15606-011408-9005 Tutorial - Page 277
Properties that are constrained to ranges of values
UPC - 606121429500
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attributes-they are characteristics of all objects in the feature class. For example, a Roads feature class property can specify the number of lanes it has, or its speed limit. The values vary, but all Roads features have a speed limit and a certain number of lanes. You cannot change the schemas for all data source types, but you can edit the schemas for SDF files. In this lesson, you edit an SDF schema to add a property to the Roads feature class. The new property is constrained, so only certain values are valid for it. NOTE This exercise uses the map you modified in Exercise 2: Connect to the new SDF data (page 264). Properties that are constrained to ranges of values You can specify that only values within a particular range are valid. You can include or exclude each extreme of the range: the lowest possible value and the highest. For example, you can make a range 1 - 100 inclusive. You can specify a range of any value higher than 1 and lower than 100, but not 1 or 100. You can specify any combination. To add a property to the Roads feature class that is constrained by range 1 Switch the Task pane to Map Explorer. 2 Select the SDF data source at the top of the pane. 3 Click Schema ➤ Edit Schema. Edit the SDF schema. Exercise 4: Add a property | 269