The article provides metadata on the descriptions of hymnographic terms exposed on the Scripta Bulgarica electronic portal (http://www.scripta-bulgarica.eu). The purpose of the analysis is to take the first step towards building a detailed digital ontology of all hymnographic terminology for the needs of specialized web products. All the hymnographic concepts included in the portal are arranged in a hierarchical system which comprises as well some of the most closely related concepts of other kinds (generally liturgical and literary). The selection of terms involves several of the basic musical and musicological hymnographic concepts too, but focuses on the verbal side of the chants. The proposed hierarchical model is based on two types of relationships: category/subcategory and whole/part, the second of which ranks the hymnographic terminology in five levels from the highest (Books) to the lowest (Genre components).