In order to guarantee open access and full searchability, research in historical lexicography and lexicology must follow the same directions as the evolution of the Internet, which has moved from hypertext-based resources to more significative services and products stored and disseminated through databases and, more recently, through knowledge bases. Against this background, this book addresses specific questions like What is involved in the digitisation of linguistic data? What annotation systems can give rise to datasets compatible with knowledge bases? What standards are needed to reach full searchability? What sources and methods can be used to gather the lemmas of a historical dictionary? What determines the obsolescence of lexicographical resources?