IEEE N42.42-2006 pdf free download – American National Sta ndard Data Format for Radiation Detectors Used for Homeland Security.
3.3 Quantities and units
Quantities associated to elements and attributes have well defined units. This standard uses the International System of Units (SI). Multiples and submultiples of SI units will be used, when practicable, according to the SI system.
This standard also uses the following units:
– For energy: kilo-electron-volt (symbol keV), 1 keV = 1.602 × 10 –16 J
– For ambient dose equivalent: microsievert (symbol: μSv).
– For exposure: milliroentgen (symbol: mR), 1 mR/h = 2.58 × 10 –7 C/kg/h
– For multimedia file size value: kilobytes (symbol: kB)
SI units should be used for those elements whose values require the indication of the associated “unit” attribute; the unit used should be appropriate for the recorded or measured value.
As this standard addresses data format, decimal numbers, real number, date, time and time duration require the use of a period,”.”, instead of a comma, “,”, to express a value.
The conversion of exposure to ambient dose equivalent is discussed in Annex J.
3.4 Standard word usage
In this document, the following word usage applies:
– The word “shall” signifies a mandatory requirement (where appropriate, a qualifying statement is included to indicate there may be an allowable exception.)
– The word “should” signifies a recommended specification or method
– The word “may” signifies an acceptable method or an example of good practice
4. General characteristics
4.1 Design principles used in this standard
The design principles used in the standard are the following:
a) Readability: data should be in a format that can be easily accessed and understood by analysts without the need for proprietary software.
b) Compatibility: data should be in a format that is compatible with accepted international standards for data representation to the broadest extent possible.
c) Extensibility: the data format should provide for unforeseen future needs and for as-yet unknown requirements particular to the specific needs of individual manufacturers of radiation measurement instrumentation.
d) Impartiality: the data format should not favour any particular commercial interest by adopting a particular manufacturer’s or organization’s practices.
4.2 Characteristics of the data format
With the design principles in mind, the data fonnat, henceforth referred to as the “N42 data format,” defined by this standard is based upon Extensible Markup Language (XML) 1.0. SpecifIcally, this standard requires the data from the radiation measurement instrument shall comply with the Following data formats:
a) The data shall be rendered in an XML document in conformance to the XML 1.0 and XML Schema Part 2 standards. In this standard, an XML document is considered identical to an XML file and the terms will be used synonymously.
b) Documents produced according to this standard shalt be capable oF being validated against the master N42 schema, as well as any other scheinas required by that document.
c) Data authentication, when required. shall be provided via XML-Signature (see LETE RFC 3275).
d) Data encryption. when required. shall be provided via XML Encryption (see XML Encryption Syntax and Processing).
NOTE—Document compression is not addressed in this standard.
This standard has the following general characteristics:
a) Radiation measurement instrumentation information is expressed as a hierarchical structure of data items.
b) The data format employs XML tagging as defined by XML 1,0, Third Edition, and follows the guidelines of XMl. Schema Part 0, lSOflF.C 11179-4, and ISO/IEC 11179-5.
c) Mixed content is not allowed, i.e., insertion of tags inside of content is not allowed, Nonprinting character data are permitted between closing and opening tags.
d) In order to allow the data to be accessed using simple text editors, only ISO/IEC 10646-I character encoding shall be used.IEEE N42.42 pdf download.