Most generally, domain knowledge is the knowledge which is valid and directly used for a pre-selected domain of human endeavor or an autonomous computer activity. Knowledge is defined ( Oxford English Dictionary) variously as (i expertise and skills acquired by a person through experience or education the theoretical or practical understanding
Specialists and experts use and develop their own domain knowledge. An "expert" ( is someone widely recognized as a reliable source of technique or Skill whose faculty for judging or deciding rightly justly
If the concept domain knowledge or domain expert is used we emphasize a specific domain which is an object of the discourse/interest/problem.
More particular, in software engineering, domain knowledge is knowledge about the environment in which the target system operates, for example, software agents. In Computer science, a software agent is a piece of software that acts for a user or other program in a relationship of agency. Domain knowledge is important, because it usually must be learned from software users in the domain ( as domain specialists/experts), rather than from software developers.
Communicating between end-users and software developers is often difficult. They must find a common language to communicate in. Developing enough shared vocabulary to communicate can often take a while.
Expert’s domain knowledge (frequently informal and ill structured) is transformed in computer programs and active data, for example in a set of rules in knowledge bases, by knowledge engineers.
Remarks - The same knowledge can be included in different domain knowledge. - Knowledge which may be efficient in every domain is called domain-independent knowledge, for example logics and mathematics. - Operations on domain knowledge are performed by meta-knowledge. Metaknowledge or meta-knowledge is Knowledge about a preselected knowledge
Hjørland, B. & Albrechtsen, H. (1995). Toward A New Horizon in Information Science: Domain Analysis. Journal of the American Society for Information Science, 1995, 46(6), 400-425.