7.4.1.1
If a BLPU is described in the LPI by reference to another BLPU (as a Child to a Parent), then in order to uniquely identify it the LPI must contain a SAO. For example a flat SAO within a block should reference the block name in its PAO (“Flat 1, Alpha House”). For the description of the structure of ‘Parent / Child’ Record see Section 11.9.1.
7.4.1.2
If a BLPU is within another BLPU and the description does not reflect this, for example legacy Records of suffixed flats with a shared access, then it is acceptable for the Child Record to have an entry in the PARENT_UPRN and for there to be no SAO present in the Child Record.
7.4.1.3
For best practice on numbering flats with a shared access, see Section 4.3.2.7.
7.4.1.4
For guidance on how to enter a PAO and a SAO, depending on the nature of the Object to be recorded, see Section 11.