OCLC research scientist Stuart Weibel joins Erik Duval, Wayne Hodgins, and Stuart Sutton to explicate the foundations of agreement between the Dublin Core Metadata Initiative (DCMI) and the Institute for Electrical and Electronics Engineers (IEEE) Learning Object Metadata (LOM) working group. The agreement was made at a joint metadata taskforce meeting in Ottawa in August, 2001. The article includes a brief glossary of metadata-related terms. Citation: "Metadata Principles and Practicalities." D-Lib Magazine Vol. 8, no. 4 (April 2002).