Transcript Metadata templates and patterns File

Metadata templates and patterns
Sergey Sukhonosov, Dr. Sergey Belov
National Oceanographic Data Centre, Russia
Metadata templates
Use registered metadata as a template to create similar
metadata
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Metadata patterns
 Data presentation and dissemination:
- fixed point (data series for points fixed in space);
- trajectory (data series of vector representation);
- region (data series for regions with the predetermined 4 or more boundary
coordinates, test sites);
- grid (series of grid point data)
- spatial presentation is not defined (data are not systematized or this attribute
of description cannot be used).
Examples:
- fixed point – data from meteorological stations, ports, etc.
- trajectory – data from RV cruises, satellite passes, sections, etc.
- region – data for administrative regions, districts, etc.
- grid – 1-degree grid point data, 50-km grid point data, etc.
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Metadata patterns
Time presentation – defines time frequency of data presentation; every hour, every
day, every month, etc.
Vertical presentation – defines presentation of data by height (depth): nonstandard
levels, layer, surface (sea, land), standard levels, not identified.
Data quality description – plain text provide brief information on quality control of the
data set represented by the resource. If the document describing quality control
procedures is available, give its URL.
Subsection (4): Data dissemination
Periodicity of data source updating – defines the periodicity of local data set (DBMS
database, data file) updating: every hour, every day, every month, other.
Data presentation form – Defines data presentation form:
- digital table, profile and model – structured data
- digital map – shape-files in vector format;
- digital document – any electronic document in formats MSWord, Acrobat, HTML;
- digital presentation – any presentation including raster format maps;
- digital video
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Metadata patterns
Data presentation format and format version – defines the data format.
Codes contain only self-documenting formats (structures and languages)
and multimedia formats; for specific formats one code is identified localFormat, undefined.
Examples: NetCDF,v.3, HDF, v.4, BUFR,undefined, UiDF, text/plain,undefined,
text/xml,undefined, application/msword, undefined, application/pdf,
undefined, image/tiff,undefined, video/avi,undefined, application/arcview,
v.9
Media on which it is possible to obtain data (not on-line) – defines type of
media on which data can be obtained on request (CD, DVD, etc.).
Conditions of access to information – defines conditions of access to data by
categories: - “free information” (available for all users without any
conditions) or “information provided to specific users”
Conditions of information use – condition of information use are fixed
–Sets the conditions for use of the information considering copyrights, or
rights of ownership
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Metadata patterns
Date/time of beginning – Defines date/time of data beginning in the
resource (resource instance). This attribute has a pattern:
“YYYY-MM-DD:’T’hh-mm” set by the mask “date/time” depending on
the attributes “Level of data processing”, “Time presentation” (the
section “Presentation and dissemination”). If the type of physical
data storage is DBMS and SDF, the value of elements is updated
automatically following resource scheduler.
Date/time of end – similar to date/time of beginning
Minimum height (depth) – defines minimum value of height of
observations in data. Height has “+” sign, depth has “-“ sign. Default
units of measurements are meters (integer).
Maximum height (depth) – similar to minimum height (depth)
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Metadata patterns
Identifier of geographic area, name of geographic area –
defines geographic areas for the data contained in the
resource. Choices are defined by system dictionaries:
oceans and seas; cities; countries
Geographic coordinates – defines 4 boundary coordinates
(+north/east, -south/west) of the geographic region
enclosing the data. If the type of physical data storage
system is DBMS and SDF, boundary coordinates are
updated automatically with periodicity set by resource
scheduler.
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Metadata patterns
There are 3 types roles for contacts:
 Originator – defines institution or person who creates
the data;
 Resource provider – defines organization which is
responsible for providing the data;
 Point of contact – defines the organization and a person
who prepared the description
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Metadata patterns
 Data granularity setup
It depends on metadata field “Distribution type”
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Questions?
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