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Changes for page 10 Constraints

Last modified by Artur on 2025/09/10 11:19
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edited by Helena
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To version 1.4
edited by Helena
on 2025/06/16 12:12
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216 216  
217 217  The following logic explains how the inheritance mechanism works. Note that this is conceptual logic and actual systems may differ in the way this is implemented.
218 218  
219 -1. Determine all possible keys that are valid at the higher level.
220 -1. These keys are deemed to be inherited by the lower-level constrained object, subject to the Constraints specified at the lower level.
221 -1. Determine all possible keys that are possible using the Constraints specified at the lower level.
222 -1. At the lower level inherit all keys that match with the higher-level Constraint.
223 -1. If there are keys in the lower-level Constraint that are not inherited then the key is invalid (i.e., it is less restrictive).
219 +1.
220 +11. Determine all possible keys that are valid at the higher level.
221 +11. These keys are deemed to be inherited by the lower-level constrained object, subject to the Constraints specified at the lower level.
222 +11. Determine all possible keys that are possible using the Constraints specified at the lower level.
223 +11. At the lower level inherit all keys that match with the higher-level Constraint.
224 +11. If there are keys in the lower-level Constraint that are not inherited then the key is invalid (i.e., it is less restrictive).
225 +111. Constraints Examples
224 224  
225 -=== 10.4.7 Constraints Examples ===
226 -
227 227  ==== 10.4.7.1 Data Constraint and Cascading ====
228 228  
229 229  The following scenario is used.
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237 237  
238 238  In the DSD, common code lists are used and the requirement is to restrict these at various levels to specify the actual code that are valid for the object to which the Constraint is attached.
239 239  
240 -[[image:1750065279010-260.png]]
241 241  
242 242  **Figure 20: Example Scenario for Constraints **Constraints are declared as follows:
243 243  
244 -[[image:1750065319060-899.png]]
245 245  
246 246  **Figure 21: Example Constraints**
247 247  
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282 282  
283 283  DSD Constraint
284 284  
285 -
286 286  Dataflow Constraints
287 287  
288 -
289 289  Provision Agreement Constraint
290 290  
291 -
292 292  **10.4.7.2 Combination of Constraints**
293 293  
294 294  The possible combination of constraining terms are explained in this section, following a few examples.
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