Metadata templates and patterns

Sergey Sukhonosov, Dr. Sergey BelovNational Oceanographic Data Centre, Russia

Training course on establishment of the ODP regional node and data network for SNDM-Argentina,7 - 11 October 2013, Buenos Aires, Argentina

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Metadata templatesUse registered metadata as a template to create similar metadata

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Metadata patternsData 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 patternsTime 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 patternsData 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 patternsDate/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 patternsIdentifier 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 patternsThere are 3 types roles for contacts: Originator – defines organization which is the data

owner;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 patternsData granularity setup

It depends on metadata field “Distribution type”

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Questions?