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A stable identifier separates similar records - Paper 1

Read the information, then answer the questions. An adult may read the instructions aloud. Show your working where asked.

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Fictional catalogue contains two records: ID B09, title 'Harbour'; ID B10, title 'Harbour'. An edit request targets only ID B10, changing its title to 'Harbour revised'. IDs are unique stable keys; titles are editable labels and may repeat. Practice uses no real personal records.

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