The data described in this report were collected for the DIPAC-project.1 The project’s aim was to closer investigate the proposed crisis of parties and party systems in Western Europe during the last decades.  To fulfil this aim, one of our main goals was to collect electoral manifestos from all parties in the respective party system for all selected years, and code their ideological contents. The main reason for our choice to code manifestos was to provide a more detailed and nuanced foundation for analyzing ideological polarization and ideological change in Western European party system than the saliency-oriented perspective that has hitherto dominated manifesto-research. In this report, we conclude that the DIPAC coding of ideological position has yielded highly reliable measures, whereas the coding of saliency should be interpreted with some caution with regard to the GAL-TAN dimension and sub-dimensions.