LastDocId
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Information processing systems commonly use unique identifiers to refer to individual items (e.g. each record in a database table, each document in a set of documents). When a new item is created, its identifier (Id) is often computed by incrementing the identifier of the last document created. LastDocId (last document id) is a usual abbreviation to designate the object (for instance a variable, a node or a record) that stores such value independently of the data themselves.
Each time a new Id is required, two values are computed:
- LastDocId = LastDocId + 1
- Id = LastDocId
No matter what subsequently happens of the item designated by Id - in particular if it is deleted -, the routine provides the system with a new Id with no risk of overriding an older value.
