7.3.2.1
Each LPI shall contain a PAO number and / or PAO name. This provides details of the Street number and / or building name of a property. If those details are approved or are assumed to have been approved by the SNN Authority the LPI is indicated as the Official Address or description of the BLPU.
7.3.2.2
See Section 2.5 for rules relating to the use of:
- Hyphens.
- Full stops.
- Use of the elision of vowels in the Welsh language.
- Ampersands.
- Abbreviations.
7.3.2.3
Each LPI must contain a USRN, obtained from the LLPG ASG, to enable it to be geographically referenced in relation to a Street.
7.3.2.4
If a BLPU is associated with a type 9 Street Record, an Alternative LPI must be created linking the BLPU to the most appropriate type 1 or type 2 Street Record. This ensures that the emergency services can find BLPUs when accessing them by vehicle. This does not apply to Street BLPUs with a Classification BLPU_CLASS = “PS”.
7.3.2.5
Approved Preferred LPIs must not be associated with type 3 and 4 Street Records unless they are Street BLPUs.
7.3.2.6
If a BLPU is associated with a type 4 Street Record through an Alternative LPI, that BLPU must also have an Approved Preferred LPI associated with a type 1 or 2 Street Record.
7.3.2.7
A current LPI Record must be unique in respect of the combination of its PAO (SAO) and USRN values. The exception to this is if two properties on the same street use the same PAO Name with no number, then the postcode may be taken into account. This only applies to legacy Records.
7.3.2.8
Each LPI shall also be attributed with a unique key to assist in the matching of address identifiers in a relational database environment. The LPI unique key shall take the form of an alphanumeric value assigned to each LPI in the LLPG:
- nnnnLsssssssss (for example, 1530L000054321) where:
- nnnn is the LOCAL_CUSTODIAN_CODE
- L denotes the LPI type of unique key
- sssssssss is the LPI sequence number
7.3.2.9
For example, the BLPU 100081247184 has two LPIs, each with individual LPI keys:
LOGICAL_STATUS
Approved Preferred LPI
PAO_TEXT
“Templars Retail Park”
USRN
37804933
POSTCODE
“SG1 1HN”
LPI_KEY
1935L000024793
LOGICAL_STATUS
Alternative LPI
PAO_TEXT
“The John Allen Centre”
USRN
37804933
POSTCODE
LPI_KEY
1935L000024794