Concept of 'substantial'
2 preliminary rulingsJudgment of 5 Mar 2009, C-545/07 (Apis-Hristovich) 
Article 7 of Directive 96/9 must be interpreted as meaning that, where there is a body of materials composed of separate modules, the volume of the materials allegedly extracted and/or re-utilised from one of those modules must, in order to assess whether there has been extraction and/or re-utilisation of a substantial part, evaluated quantitatively, of the contents of a database within the meaning of that article, be compared with the total contents of that module, if the latter constitutes, in itself, a database which fulfils the conditions for protection by the sui generis right. Otherwise, and in so far as the body of materials constitutes a database protected by that right, the comparison must be made between the volume of the materials allegedly extracted and/or re-utilised from the various modules of that database and its total contents. The fact that the materials allegedly extracted and/or re‑utilised from a database protected by the sui generis right were obtained by the maker of that database from sources not accessible to the public may, according to the amount of human, technical and/or financial resources deployed by the maker to collect the materials at issue from those sources, affect the classification of those materials as a substantial part, evaluated qualitatively, of the contents of the database concerned, within the meaning of Article 7 of Directive 96/9. The fact that part of the materials contained in a database are official and accessible to the public does not relieve the national court of an obligation, in assessing whether there has been extraction and/or re‑utilisation of a substantial part of the contents of that database, to verify whether the materials allegedly extracted and/or re-utilised from that database constitute a substantial part, evaluated quantitatively, of its contents or, as the case may be, whether they constitute a substantial part, evaluated qualitatively, of the database inasmuch as they represent, in terms of the obtaining, verification and presentation thereof, a substantial human, technical or financial investment.
Judgment of 9 Nov 2004, C-203/02 (British Horseracing)
The expression ‘substantial part, evaluated … quantitatively, of the contents of [a] database’ in Article 7 of Directive 96/9 refers to the volume of data extracted from the database and/or re-utilised and must be assessed in relation to the total volume of the contents of the database. The expression ‘substantial part, evaluated qualitatively … of the contents of [a] database’ refers to the scale of the investment in the obtaining, verification or presentation of the contents of the subject of the act of extraction and/or re-utilisation, regardless of whether that subject represents a quantitatively substantial part of the general contents of the protected database. Any part which does not fulfil the definition of a substantial part, evaluated both quantitatively and qualitatively, falls within the definition of an insubstantial part of the contents of a database.
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