ILR specification: 2021 to 2022

Percentage Taught in First LDCS Subject: field


The proportion of Learning Directory Classification System (LDCS) fields indicate the relative percentage of the course as a whole that the LDCS subject area(s) make up. This field, PCSLDCS and PCTLDCS should be considered as a block of related data.

Reason required

To monitor OfS funding returns.

Schema definitions

XML Element Name
Field length
Data type
Minimum occurrences
Maximum occurrences

Collection requirements

  • Collected for all aims

Valid entries

Must contain a value in the range 0 to 100.0


  • Providers are not expected to fill out this field from a detailed student by student assessment. The judgement of the percentages taught in each LDCS subject should be made for the course as a whole and so the values recorded in fields PCFLDCS, PCSLDCS and PCTLDCS should be the same for all students on the same course.

  • Percentage taught in the first LDCS subject should relate to the course as a whole taught in the LDCS subject area returned in the first LDCS subject field in the LARS database for the learning aim linked to in the learning aim field for this learning aim. Similarly, percentage taught in the second and third LDCS should relate to the fields second LDCS and third LDCS respectively.

  • The most recent (at the census date of the collection) version of the LARS database should be used. In general, OfS will use this version of the LARS database for all analyses.

  • The length of this field is 5 characters, data should be returned with or without leading zeros or the decimal place, e.g. 005.0 or 5.0 or 5.

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