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Since the existing metadata define the structure of information using non-unified semantics, syntax, and representation methods, they set a limit in the search for exact information. To address this problem, metadata for construction project information that are frequently used in the construction industry were developed in this study, for the first time in Korea, by referring to the information standard development guidelines of UN/CEFACT. In addition, to establish reciprocal compatibility with the metadata which will be developed in the future, metadata development guidelines were formulated. The results of this study can be used in accurately expressing the semantic relationship between the essential meanings and their representations, such as RDF (resource description framework), in the establishment of an information system for the asset management of public facilities.