|
'''Camp Shelby''' is a military post approximately 15 miles south of [[Hattiesburg, Mississippi]], on [[United States Highway 49]]. It is the largest state owned training site in the nation, has a long history of serving the country and is considered by many as “a national treasure.” During wartime, the camp's mission is to serve as a major, independent mobilization station of the [[U.S. Army Forces Command]] (FORSCOM). Camp Shelby Training Site is the largest reserve component training site, covering 136,000 acres, allowing up to battalion level maneuver training, Gunnery Table 8-12, excellent FA Firing Points and a wide range of support facilities. This is the normal Annual Training ___location for [[National Guard]] and Reserve units located in Mississippi, Alabama, and Tennesse. However, units from accross the country use its excellent assets to support a varity of missions. The 2nd BN, 114th FA conducts its gunnery and has the bulk of its combat equipment stored in the Mobilization and Annual Training Equipment Site (MATES) located there.
A '''representation term''' is a character string that associates a [[data element]] with a type representation in a [[computer]] system. Representation terms are frequently used as a suffix in XML element name or an XML attribute name.
Camp Shelby Training Site (CSTS), encompassing over 525 square kilometers, is located in portions of [[Perry County, Mississippi|Perry]] and [[Forrest County, Mississippi|Forrest]] Counties, in south Mississippi. The training site was established during [[World War I]] and it has served almost continuously since then as a training site, not only for the Reserve Components of the Army, but also for the Active Components of the Army, Navy, Marine Corps, and Air Force. The training site consists of a mix of State, [[Department of Defense]], and [[U.S. Forest Service]] lands in the [[DeSoto National Forest]].
Representation terms are required for Data elements and Value Domains that use the [[ISO-11179]] metadata registry standards and are part of the ISO [[Data element name]] to indicate the type of data the element that the Data Element contains. There are only a small list of approved representation terms (around a dozen) and some standards such as [[UDEF]] assign numeric codes to these terms. All properties data elements MUST have an associated representation terms.
Encompassing more than 134,820 acres, Camp Shelby, Mississippi is the largest state-owned and operated field training site in the United States. It is a training ground for the [[M1 Abrams|Abrams M1 Tank]], [[Paladin Howitzers]] and home to the 3rd Brigade 87th Division Training Support. Camp Shelby serves as a training site for National Guardsmen and Reservists from throughout the country hosting as many as 100,000 personnel annually.
For example if an XML Data fragment had the was the following:
Camp Shelby was established in 1917. The Post was named in honor of [[Isaac Shelby]], Indian fighter, Revolutionary War hero and 1st Governor of Kentucky, by the first troops to train here, the [[38th Division]].
<PersonGivenName>'''John'''</PersonGivenName>
<PersonBirthDate>'''1990-08-14'''</PersonBirthDate>
In 1934, the State of Mississippi acquired the site for use as a summer camp by the National Guard. Because of Camp Shelby's natural advantages of climate, terrain and ___location, it was reopened in 1940 as a federal installation. Some of the divisions that have trained in Mississippi include the 31st, 37th, 38th, 43rd, 63rd, 65th, 69th, 85th, 94th, and the 99th Divisions.
The Representation term is the suffixes are "Name" and "Date" respectivly.
The famous [[Japanese American 442nd Regimental Combat Team]] and the [[100th Battalion]] trained here in preparation for [[World War II]]. [[Women's Army Corps]] (WAC) units also trained here. The Post contained a large convalescent hospital and had a prisoner of war camp which housed members of the German Afrika Corps.
The Representation Term is useful in that it tells the observer of a data stream (such as [[XML]] instance data) about the data type and gives an indication of how the Data Element can be used when compared with other Data Elements.
The post closed shortly after the end of World War II. During the [[Korean Conflict]], Camp Shelby was established as an Emergency Railhead Facility.
Complex Data Elements (sometimes called domains or concepts) or Data elements that are containers - not properties of an object) do not have a Representation terms. Threfore resence of a Representation term indicates that the XML data element is NOT complex and can be considered a property of another object.
In the summer of 1954, non-divisional National Guard units trained at Camp Shelby and in 1956, it was designated a permanent training site by Continental Army Command (now Forces Command). Over 5,000 troops were processed through Camp Shelby during Desert Storm Operations.
== Recomended Representation Terms ==
The following are samples of ISO 11179 representation terms that have been used for the exchange of electronic messages in systems such as [[ebXML]] 1.9 or [[GJXDM]] 3.0:
Camp Shelby is also home to the [[Youth Challenge Program]] (a boot camp for troubled youths)and the [[Mississippi Armed Forces Museum]].
{| border="1"
|+Sample Representation Terms
|-
!'''Term'''
|'''Usage'''
|-
!Amount
|Monetary value with units of currency.
|-
!BinaryObject
|Set of finite-length sequences of binary octets.
|-
!Code
|An enumerated list of all allowable values. Each enumerated value is a string that for brevity represents a specific meaning. Core example for a '''PersonGenderCode''' the valid values might be "male", "female" or "unknown".
|-
!Date
|An ISO 8601 date.
|-
!DateAndTime
|An ISO 8601 date AND time structure in the format YYYY-MM-DD. Note: Do not use unless BOTH the date AND time are REQUIRED fields. If one OR the other is optional always specify the data elements as separate date and time elements.
|-
!Graphic
|Used to store images. Secondary to Binary Object.
|-
!ID
|Abbreviation for Identifier
|-
!Identifier
|Character string used to establish identity of, and uniquely distinguish one instance of an object within an ID scheme.
|-
!Indicator
|Boolean, exactly two mutually exclusive values (true or false). A precise definition must be given for the meaning of a true value.
|-
!Measure
|Numeric value determined by measurement with units. Typically used with items such as height or weight. if the unit of measure is not clear it should be specified.
|-
!Name
|Non unique text used for identification of an object.
|-
!Number
|Assigned or determined by calculation.
|-
!Text
|Character string generally in the form of words.
|-
!Time
|ISO time structure.
|-
!Value
|A type of Numeric.
|-
!Percent
|A type of Numeric that traditionaly is the results of a ratio calculation that ranges from values of 0 to 1 for values of 0% to 100%.
|-
!Quantity
|Non-monetary numeric value or count with units.
|-
!Rate
|A type of Numeric
|-
!Sound
|Used to store sound. Secondary to Binary Object.
|-
!Video
|Used to store video images. Secondary to Binary Object.
|-
!Year
|ISO Year
|}
== Pros of Representation Terms ==
* Use of representation terms in a Data element name is a convention that is widly adopted by several large systems such as [[GJXDM]] and [[ebXML]].
* But many data architechts that are responsible for mapping XML from foriegn sources find Representation terms very useful.
* Starndards such as the [[UDNF]] depend of accurate coding of Representation Terms.
* Tools that validate against enumeration lists can distingush coded values quickly by looking for the "Code" suffix.
== Cons of Representation Terms ==
* People frequently complain that adding a representation terms to each XML data element makes the XML data too bulky.
* The actual representation terms used is not a required part of the ISO-11179 standard. It is only recomended set of words. The actual words used and their integer codes associated with a representation term is dependant on the implementation.
== See Also ==
* [[ISO-11179]]
* [[Metadata]]
* [[XML]]
* [[XML Schema]]
* [[Universal Data Element Framework]]
== External links ==
* [http://www.ebxml.org/specs/ebCCNAM.pdf| Electronic Business using eXtensible Markup Language Core Components Naming Sonventions]
[[Category:Metadata]]
[[Category:Semantics]]
| 