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Once your ID range has been reserved, you can then use the allocated IDs when creating your extension. In essence this means assigning them in your xxxMetaModel.xml file. Take the example above where we have been allocated a range of 1,000 IDs between 2,007,000 and 2,007,999:
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You need to declare the file_level and file_no attributes at the start of your xxxMetaModel.xml file (after the XML declaration):
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