The rapid development of information technologies and various information resources in the Internet environment, cultural heritage digitization, and Linked Data significantly affect the need for changes in library catalogs. Libraries need to look for new opportunities to reflect the content and form of a variety of information resources. This article introduces the main aspects of implementing the Faceted Application of Subject Terminology (FAST) at the National Library of Latvia. It describes how form/genre headings are adopted from FAST for different information resources at the National Library of Latvia and the main challenges and benefits.