In order to accelerate the construction of professional digital content resource knowledge service platforms, effectively gather digital content resources in professional fields, and promote the construction of a national knowledge resource service system, the pilot work of a professional digital content resource knowledge service model was initiated. This article gives the hierarchical structure and standard system table of the press and publication knowledge service standardization system; Defines the top-level design, basic conditions, basic processes and basic methods of the construction and service of knowledge resources; Provides basic terms and definitions in the construction and service of knowledge resources; Provides the principles for the classification of knowledge resources and descriptions of various types; Describes the general type and structure of knowledge elements in professional knowledge services, specifies the metadata items of knowledge elements, and the way in which knowledge elements are expanded; It stipulates the characteristics, organization methods, and general description methods of knowledge application units oriented to user needs; it also specifies the construction, types, expressions, rules, and releases of knowledge associations. <<