The Library of Material Removal Shape Element Volumes (MRSEVs)
Thomas R. Kramer
STEP is the emerging international Standard for the Exchange of Product Model Data being developed under the auspices of the International Organization for Standardization (ISO). PDES is the acronym for Product Data Exchange using STEP. It is the U. S. activity in support of STEP. PDES is being furthered in the United States by several organizations. The IGES/PDES Organization (IPO) is a voluntary standards organization which participates in developing the STEP standards. Two of the many IPO/ISO committees helping develop STEP are the Form Features Committee and the Manufacturing Technology Committee. PDES, Inc. is a consortium of major companies which has the goal of accelerating the implementation of PDES. The National Institute of Standards and Technology (NIST) has established a National PDES Testbed. The Testbed is funded by the Computer-aided Acquisition and Logistic Support (CALS) program of the Office of the Secretary of Defense. Data descriptions are handled in STEP by defining an information model in the EXPRESS data modeling language [Schenck90, Spiby91] for each type of data that is needed. Once an information model is in place, data representing a specific product may be put into a computer or on paper according to the rules in STEP Part 21 for mapping EXPRESS to a STEP physical file [Altemueller88a, Altemueller88b, VanMaanen91]. The data section of a STEP physical file normally consists wholly of instances of data entities of the sort made available by the EXPRESS model.
The Library of Material Removal Shape Element Volumes (MRSEVs), NIST Interagency/Internal Report (NISTIR), National Institute of Standards and Technology, Gaithersburg, MD, [online], https://doi.org/10.6028/NIST.IR.4809
(Accessed December 9, 2023)