The European Case Law Identifier or ECLI number is a pan-European publisher-neutral system of case citation.

The structure of an ECLI citation is composed of the following elements, separated by colons:

• ECLI (optional)
• Jurisdiction identifier
• Court identifier
• Date
• unique case number

Thus a typical ECLI number for the European Court of Justice would be ECLI:EU:C:2014:325 

All ICLR case reports now include ECLI numbers of both the ECJ and the ECtHR where those cases are listed as having been referred to in the judgment or cited in argument, and we are gradually adding them retrospectively to our indexes of older case law.