All,
Here is the semantics and syntax as I understand it for the Cloud
Specific model extensions for global identifiers and geolocation.
Comments?
Job Identifiers:
*new*
job-uuid (SM:JobUuid): The identifier for a job with a global scope.
The identifier is unique for a Job across all service instances of any
service type. The UUID URN namespace is specified in rfc4122. The
format used for "job-uuid" is the string representation of a UUID as a
URN. An example is "urn:uuid:a6b90f34-d0b1-1956 -7dec-009c4386fe3".
The version (aka subtype) used is implementation specific. Version 1
(i.e. time based) is recommended. Datatype: abstract:char[64], IPP:uri
MaxLength=64, SM:xs:anyURI maxLen=64 (Note: Both the local and global
identifiers should be mandated. For legacy protocol mappings (e.g. IPP
1.1, WS-Print, LPR) the local identifier MUST still be maintained.)
ISSUE: Do we recommend/suggest: It is possible to use the time_low
portion of the Timestamp in the version 1 UUID as the local identifier.
The implementation may then keep only the 128 bit local representation
of the UUID and use it to create the appropriate protocol values.
Printer Identifiers:
*new*
printer-uuid (SM:ServiceUuid): The identifier for a Printer with a
global scope. The identifier is unique across all service instances of
any service type. The UUID URN namespace is specified in rfc4122.
The format used for "job-uuid" is the string representation of a UUID as
a URN. An example is "urn:uuid:a6b90f34-d0b1-1956 -7dec-009c4386fe3".
The version (aka subtype) used is implementation specific. Version 1
(i.e. time based) is recommended. Datatype: abstract:char[64],
IPP:uri, SM:xs:anyURI maxLen=64
Printer Location:
*new*
printer-geo-location (SM:ServiceGeoLocation): This identifies the
location of the associated device using the World Geodetic System
1984(WGS84). The means for expressing the location information is
aligned with those used in DNS [RFC1876] Datatype: abstract:class,
IPP:collection, SM:sequence
*new*
size (SM:Size): Diameter of the bounding sphere containing the device
expressed in centimeters. Datatype: abstract: int32, IPP:integer,
SM:xs:int (Note: rfc1876 encodes the value for size as a pair of 4 bit
integers with value between 0 and 9. The first integer is the base and
the second the exponent.)
*new*
horizontal-precision (SM: HorizontalPrecision): The horizontal
precision expressed as the diameter of the "circle of error" (i.e. twice
the +- error value) The units are centimeters. Datatype: abstract:
int32, IPP:integer, SM:xs:int (Note: rfc1876 encodes the value for
horizontal-precision as a pair of 4 bit integers with value between 0
and 9. The first integer is the base and the second the exponent.)
*new*
vertical-precision (SM: VerticalPrecision): The vertical precision
expressed as the diameter of the "circle of error" (i.e. twice the +-
error value) The units are centimeters. Datatype: abstract:integer,
IPP: int32, SM:xs:int (Note: rfc1876 encodes the value for
vertical-precision as a pair of 4 bit integers with value between 0 and
9. The first integer is the base and the second the exponent.)
*new*
latitude (SM:Latitude): The latitude of the center of the sphere
described by the size attribute. Expressed in thousandths of a second
of arc. The 0 represents the equator. Positive values above that are
north and Negative values are south. Datatype: abstract: int32,
IPP:integer, SM:xs:int (Note: rfc1876 encodes the value for the equator
as 2147483648 (231) to keep the latitude value positive.)
*new*
longitude (SM:Latitude): The longitude of the center of the sphere
described by the size attribute. Expressed in thousandths of a second
of arc. The value 0 represents the prime meridian. Positive values
above that are east and negative values are west. The value is rounded
away from the prime meridian Datatype: abstract: int32, IPP:integer,
SM:xs:int (Note: rfc1876 encodes the value for the prime meridian as
2147483648 (231) to keep the longitude value positive.)
*new*
altitude (SM:Altitude): The altitude of the center of the sphere
described by the size attribute. Expressed in centimeters from a base
of the reference spheroid used by GPS [WGS 84]. Altitude above (or
below) sea level may be used as an approximation of altitude relative to
the [WGS 84] spheroid, though due to the Earth's surface not being a
perfect spheroid, there will be differences. Datatype: abstract:
int32, IPP:integer, SM:xs:int (Note: rfc1876 encodes the value for the
base as 100,000m below the reference spheroid used by GPS [WGS 84]to
keep the altitude value positive.)
references:
[WGS84]
World Geodetic System 1984, Last revised 2004, National
Geospatial-Intelligence Agency,
<https://www1.nga.mil/ProductsServices/GeodesyGeophysics/WorldGeodeticSy
stem/Pages/default.aspx>
[RFC1876]
RFC1876: A Means for Expressing Location Information in the
Domain Name System, January 1996, C. Davis, P. Vixie, T. Goodwin, I.
Dickinson, <http://tools.ietf.org/rfc/rfc1876.txt>
Geolocation examples:
2-Dimmensional Location of my office printer
Google Map URL:
http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=800+phillips
+rd+webster+ny+14580&sll=37.0625,-95.677068&sspn=62.226996,106.962891&ie
=UTF8&hq=&hnear=800+Phillips+Rd,+Webster,+Monroe,+New+York+14580&ll=43.2
20973,-77.417162&spn=0.001781,0.003264&t=h&z=19
Location representations:
Decimal Degrees (WGS84)
Latitude Longitude
43.220973 -77.417162
Degrees, Minutes & Seconds
Latitude Longitude
N43 13 15 W77 25 01
GPS
Latitude Longitude
N 43 13.258 W 77 25.030
UTM
X Y
18N 303685 4788191
My office elevation:
128 meters (419 feet) above sea level
Size of Printer:
91 centimeter (3 feet)
Margin of error
183 centimeter (6 feet)
DNS LOC record (RFC1876)
Version = 0
Size = 18 (0x12) (encoded centimeter)
HorizontalPrecision = 34 (0x22) (encoded centimeter)
VerticalPrecision = 34 (0x22) (encoded centimeter)
Latitude = 2303079151 (0x8946, 0x32EF) (thousandths of a second of arc)
) (2147483648 +(DecimalDegreeLatitude*60*60*1000) ) (North is positive)
Longitude = 1868781865 (0x6F63, 0x5929)(thousandths of a second of arc)
( 2147483648-(DecimalDegreeLongitude*60*60*1000) ) (West is negative)
Altitude = 10012800 (0x0098, 0xC880)(centimeter)
(OfficeElevation+10000000)
PrinterGeoLocation (PWG)
Size = 91 (centimeter)
HorizontalPrecision = 183 (centimeter)
VerticalPrecision = 183 (centimeter)
Latitude = 155595503 (thousandths of a second of arc) ) (
DecimalDegreeLatitude*60*60*1000 ) (North is positive)
Longitude = -278701783 (thousandths of a second of arc)
(DecimalDegreeLongitude*60*60*1000) (West is negative)
Altitude = 12800 (centimeter) (above sea level (i.e. reference spheroid
used by GPS) is positive)
Peter Zehler
Xerox Research Center Webster
Email: Peter.Zehler at Xerox.com <mailto:Peter.Zehler at Xerox.com>
Voice: (585) 265-8755
FAX: (585) 265-7441
US Mail: Peter Zehler
Xerox Corp.
800 Phillips Rd.
M/S 128-25E
Webster NY, 14580-9701
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