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Digital mobile radio (DMR) is a digital radio standard for voice and data transmission in non-public radio networks.It was created by the European Telecommunications Standards Institute (ETSI), [1] and is designed to be low-cost and easy to use.
MARC 21 is a result of the combination of the United States and Canadian MARC formats (USMARC and CAN/MARC). MARC 21 is based on the NISO/ANSI standard Z39.2, which allows users of different software products to communicate with each other and to exchange data. [3] MARC 21 allows the use of two character sets, either MARC-8 or Unicode encoded ...
The physical appearance of the DMR can be a binder with documents, a document that can refer to other documents, or the same concepts in a computer as documents in a database. Labels, Instructions for Use, drawings, Certificates of Conformity, and other documents might form part of a DMR.
Records can be put in a database as a relation and viewed in a tabular form. The XML schema is defined in Appendix C of specifications [ 15 ] and a raw record is exemplified in dmarc.org. [ 16 ] Here we stick with a relational example, which better conveys the nature of the data.
DMR/dPMR true Tier 3/Mode 3 protocols are intended eventually to migrate into the "Advanced Mature high end" list below but today (2015) cannot be classified as such due to major interoperability issues, lack of mature protocol and lack of clearly defined user interface protocol. [citation needed] OpenSky System; APCO Project 16; dPMR Mode 3 ...
The MARC Standards, which BIBFRAME seeks to replace, were developed by Henriette Avram [2] at the U.S. Library of Congress during the 1960s. By 1971, MARC formats had become the national standard for dissemination of bibliographic data in the United States, and the international standard by 1973.
TETRAPOL (short for Terrestrial Trunked Radio POLice) [citation needed] is a digital professional mobile radio standard, as defined by the Tetrapol Publicly Available Specification (PAS), used by professional user groups such as public safety, military, industry and transportation organizations throughout the world.
Kaczmarski, having experimented with TETRA and DMR, decided to create a completely non-proprietary protocol and named it after the club's street address - Mokotowska 17. As every part of the protocol was intended to be open source, Codec 2, released under the GNU LGPL 2.1 license, was chosen as the speech encoder.