Abstract
In the era of interdisciplinary research supported by IT solutions, a special role is played by digital source repositories. The digital turn has contributed to their considerable development, and the application of new technologies has largely changed the current methods of research work. This facilitates pooling and structuring dispersed collections e.g. as part of thematic repositories, which collect and share thematically related resources. Metadata, which allow effective searching and identification of resources, are an important element of their function. The objective of the article is to present a procedure for the development of metadata aimed at creation of a thematic database of dispersed sources remaining after the Paris Peace Conference ending World War I. Based on the metadata development procedure, the author discusses the diagnosed problems associated with e.g. the specificity of the analyzed sources.