The Common Data File (CDF) formats provide the specificity needed for implementation of the ISO standard and the data which builds upon it. External standards have been included in the CDF formats, where appropriate, to promote data quality. The reporting of LEI and legal entity reference data is conducted daily by the LEI issuing organizations using the CDF formats.
The information available with the LEI reference data to date, e.g. the official name of a legal entity and its registered address, is referred to as ‘Level 1’ data. It provides the answer to the question of ‘who is who’. In a next step, the LEI data pool will be enhanced to include the ‘Level 2’ data that will answer the question of ‘who owns whom’.
Level 1 and Level 2 data each have different formats, respectively:
The LEI-CDF format defines how Level 1 data, i.e. the information on ‘who is who’, is reported.
The Relationship Record-CDF (RR-CDF) format defines how Level 2 data, i.e. information on ‘who owns whom’, is reported for LEI registrants whose direct and ultimate parents have an LEI.
The Parent Reference Data format defines how reference data for parent entities without an LEI is stored and transferred between LEI issuers and GLEIF.
Each format is defined in a detailed specification document, which includes:
An XML schema definition (XSD) which enforces minimum data quality criteria. A file which does not pass XSD validation cannot be included in the GLEIF Concatenated Files and the Global LEI Index. The schema defines:
The structure of each data element.
The associated code lists.
The associated data element attributes.
The technical specification documents also contain concise definitions of the data elements.
For further information, refer to these dedicated GLEIF website pages: