This document discusses the modeling of questionnaires for technology-enabled care services (TICS). It aims to comprehensively describe the TICS domain to enable the development of suitable computing tools. The modeling represents an improvement over existing tools by introducing standard blocks and elements that can be reused across questionnaires. This includes thematic blocks that group related questions, and a question pool containing reusable questions and thematic typical blocks. The modeling aims to facilitate questionnaire design and allow computerized manipulation of questionnaires.