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== UK GEMINI v2-2 Specification for Discovery Metadata for Geospatial Resources
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include::./includes/attributes.asciidoc[]
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- Return
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- to{nbsp} https://www.agi.org.uk/gemini/40-gemini/1037-uk-gemini-standard-and-inspire-implementing-rules[GEMINI
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+ Return to https://www.agi.org.uk/gemini/40-gemini/1037-uk-gemini-standard-and-inspire-implementing-rules[GEMINI
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2.3 home page]
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- https://www.agi.org.uk/gemini/40-gemini/1051-uk-gemini-v2-2-specification-for-discovery-metadata-for-geospatial-resources#Intro[Introduction]
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+ :sectnums:
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+ :sectnumlevels: 3
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- https://www.agi.org.uk/gemini/40-gemini/1051-uk-gemini-v2-2-specification-for-discovery-metadata-for-geospatial-resources#scope[1.
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- Scope]
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-
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- https://www.agi.org.uk/gemini/40-gemini/1051-uk-gemini-v2-2-specification-for-discovery-metadata-for-geospatial-resources#normative_ref[2.
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- Normative Reference]
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-
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- https://www.agi.org.uk/gemini/40-gemini/1051-uk-gemini-v2-2-specification-for-discovery-metadata-for-geospatial-resources#terms[3.
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- Terms and Definitions]
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-
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- https://www.agi.org.uk/gemini/40-gemini/1051-uk-gemini-v2-2-specification-for-discovery-metadata-for-geospatial-resources#requirements[4.
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- Requirements]
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-
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- https://www.agi.org.uk/gemini/40-gemini/1051-uk-gemini-v2-2-specification-for-discovery-metadata-for-geospatial-resources#4.1[4.1
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- Datasets and dataset series]
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-
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- https://www.agi.org.uk/gemini/40-gemini/1051-uk-gemini-v2-2-specification-for-discovery-metadata-for-geospatial-resources#4.2[4.2
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- Services]
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-
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- https://www.agi.org.uk/gemini/40-gemini/1051-uk-gemini-v2-2-specification-for-discovery-metadata-for-geospatial-resources#4.3[4.3
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- Element details]
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-
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- https://www.agi.org.uk/gemini/40-gemini/1051-uk-gemini-v2-2-specification-for-discovery-metadata-for-geospatial-resources#extended[5.
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- Extended metadata]
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-
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- https://www.agi.org.uk/gemini/40-gemini/1051-uk-gemini-v2-2-specification-for-discovery-metadata-for-geospatial-resources#5.1[5.1
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- Additional metadata elements]
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-
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- https://www.agi.org.uk/gemini/40-gemini/1051-uk-gemini-v2-2-specification-for-discovery-metadata-for-geospatial-resources#5.2[5.2
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- Extension of code lists]
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-
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- === Foreword
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+ == Foreword
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UK GEMINI was originally produced in 2004 by collaboration between the
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Association for Geographic Information (AGI), the (then) e-Government
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In 2018, changes were made that had been requested by various user
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communities as well as the revised metadata technical guidance from
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- INSPIRE. {nbsp} This updated version is known as UK GEMINI2.3.
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+ INSPIRE. This updated version is known as UK GEMINI2.3.
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Further details of all these changes are
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- given{nbsp}https://www.agi.org.uk/40-gemini/ 1055-uk-gemini-major-changes-since-1-0[here].
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+ given link: 1055-uk-gemini-major-changes-since-1-0[here].
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A set of guidelines for metadata for geospatial datasets was originally
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produced in 2006. The Guidelines were in three parts:
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These Guidelines were intended for general use in the UK geographic
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information environment, and particularly in support of the national
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- geospatial metadata service,{nbsp} _gigateway_. They were developed within the
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+ geospatial metadata service, _gigateway_. They were developed within the
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context of a national geospatial metadata service, and UK GEMINI. These
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Guidelines have now been updated to incorporate the changes made in the
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revised version of UK GEMINI, 2.3, and their content made available on
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- the AGI
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- website:{nbsp}https://www.agi.org.uk/gemini/40-gemini/1052-metadata-guidelines-for-geospatial-data-resources-part-1[Introduction
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- to Metadata]; parts
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- of{nbsp}https://www.agi.org.uk/gemini/40-gemini/1049-metadata-guidelines-for-geospatial-data-resources-part-2[Creating
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- metadata using GEMINI]; material in Part 2 which was specific to
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- particular elements has been moved to the element descriptions.
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+ the AGI website: link:1052-metadata-guidelines-for-geospatial-data-resources-part-1[Introduction to Metadata];
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+ parts of link:1049-metadata-guidelines-for-geospatial-data-resources-part-2[Creating metadata using GEMINI];
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+ material in Part 2 which was specific to particular elements has been moved to the element descriptions.
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This Standard is maintained by the AGI Standards Committee. Any feedback
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- on it should be sent
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-
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+
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- === [#Intro]#### Introduction
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+ == Introduction
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Geospatial data is data containing a locational element relative to the
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Earth. Many datasets that at first sight do not appear to be geospatial
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at different times by different bodies for different purposes. The main
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one that is relevant to geospatial datasets is:
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- * ** ISO 19115,{nbsp}** the International Standard which describes all aspects
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+ * *ISO 19115*, the International Standard which describes all aspects
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of geospatial metadata and provides a comprehensive set of metadata
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elements that are widely used as the basis for geospatial metadata
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services.
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- The{nbsp}https://inspire.ec.europa.eu/about-inspire/563[EU INSPIRE
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- Directive]{nbsp}[https://www.agi.org.uk/gemini/40-gemini/1047-metadata-guidelines-for-geospatial-data-resources-part-3[7]]{nbsp}mandates
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+ The https://inspire.ec.europa.eu/about-inspire/563[EU INSPIRE Directive] mandates
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the collection of metadata for use in Europe. Implementing Rules define
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the requirements for metadata for discovery purposes. These are based on
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ISO 19115, and
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- outlined{nbsp}https://www.agi.org.uk/40-gemini/ 1055-uk-gemini-major-changes-since-1-0[here].
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+ outlined link: 1055-uk-gemini-major-changes-since-1-0[here].
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The aim of UK GEMINI is to provide a core set of metadata elements for
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use in a UK geospatial metadata service, that are compatible with the
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‘dataset’. This is to allow UK GEMINI to be applied to resources in
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addition to datasets, such as services supplying data.
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- === [#scope]##{nbsp}1. Scope
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+ == Scope
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This Standard specifies a set of metadata elements for describing
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geographic information resources. These resources may be datasets,
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dataset series, services delivering geographic data, or any other
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information resource with a geospatial content. This includes datasets
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- that relate to a limited geographic area
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- [https://www.agi.org.uk/gemini/40-gemini/1047-metadata-guidelines-for-geospatial-data-resources-part-3[1]].
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+ that relate to a limited geographic area.
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The data resources may be graphical or textual (tabular or free text),
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hardcopy or digital.
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The metadata elements are intended for use in a metadata service for
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discovering what data resources exist. The elements include the
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- mandatory core set defined in ISO 19115 Geographic information –
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- Metadata, and comply with
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- the{nbsp}https://inspire.ec.europa.eu/metadata/6541[INSPIRE Implementing
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- Rules for
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- Metadata]{nbsp}[https://www.agi.org.uk/gemini/40-gemini/1047-metadata-guidelines-for-geospatial-data-resources-part-3[7]].
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+ mandatory core set defined in ISO 19115 Geographic information – Metadata,
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+ and comply with the https://inspire.ec.europa.eu/metadata/6541[INSPIRE Implementing Rules for Metadata].
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In any implementation or community, it is likely that additional
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metadata elements will be included for other purposes, such as data
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management, and a method for specifying such elements is defined. The UK
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specific guidance is designed to ensure that the metadata records work
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correctly with the national
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- catalogue,{nbsp} https://data.gov.uk/[https://data.gov.uk]
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+ catalogue, https://data.gov.uk/[https://data.gov.uk]
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Guidance on transferring metadata records to the national catalogue are
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given
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- at{nbsp}https://www.agi.org.uk/gemini/40-gemini/1054-operational-guide[Operational
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- Guide].
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+ at link:1054-operational-guide[Operational Guide].
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This Standard is applicable to data creators, data owners, data
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publishers and suppliers of metadata services. Although it is primarily
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designed for data resources held within the UK on a national basis, by
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following the principles and structures of ISO 19115, it is also
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applicable within an organisation, user community or nation.
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- === [#normative_ref]##{nbsp}2. Normative References
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+ == Normative References
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The following referenced documents are indispensable to the application
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of this document. For dated references, only the edition cited applies.
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https://inspire.ec.europa.eu/Technical-Guidelines2/Metadata/6541[The
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INSPIRE Metadata Technical Guidance], v2.0.1, published 2017-03-02
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- === [#terms]##{nbsp}3. Terms and Definitions
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+ == Terms and Definitions
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- See the{nbsp}https://www.agi.org.uk/gemini/40-gemini/ 1056-glossary[Glossary].
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+ See the link: 1056-glossary[Glossary].
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- === [#requirements]##{nbsp}4. Requirements
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+ == Requirements
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- ==== *_[#4.1]####4.1 Datasets and dataset series_*
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+ === Datasets and dataset series
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UK GEMINI specifies a set of metadata elements for use when describing
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geographic information resources.
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The metadata elements are listed in
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- the{nbsp}https://www.agi.org.uk/40-gemini/1055-uk-gemini-major-changes-since-1-0[summary
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- table], which shows the metadata element names, their GEMINI element id
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+ the link:1250-element-summary[summary table], which shows the metadata element names, their GEMINI element id
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(consistent with element numbers in previous versions of GEMINI), the
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obligation (whether their inclusion is mandatory, optional or
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conditional, and the number of possible occurrences of the element
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For metadata to conform to this Standard, it is necessary that all
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mandatory elements are provided, and that all conditional elements are
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provided when the stated condition is met. Optional elements should be
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- provided where they are applicable. A checklist for conformity is
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- given{nbsp}https://www.agi.org.uk/gemini/40-gemini/1040-checklist-for-conformity2[here].
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+ provided where they are applicable.
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- ==== {nbsp}*_[#4.2]####4.2 Services_*
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+ === Services
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The INSPIRE Implementing Rules apply not only to datasets and datasets
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series, but also to (data) services. These are external applications
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of approach regarding the way that metadata is recorded for services.
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Some of the other metadata elements may not apply to particular types of
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service. The UK GEMINI metadata elements for services are identified in
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- the{nbsp}https://www.agi.org.uk/40-gemini/1055-uk-gemini-major-changes-since-1-0[summary
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- table].
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+ the link:1250-element-summary[summary table].
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- ==== *_[#4.3]####4.3 Element details_*
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+ === Element details
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Details of the metadata elements are given in :
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- https://www.agi.org.uk/gemini/40-gemini/1062-gemini-datasets-and-data-series[GEMINI
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- - Datasets and dataset series]
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+ link:datasets.html[GEMINI - Datasets and dataset series]
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- https://www.agi.org.uk/gemini/40-gemini/1063-gemini-services[GEMINI -
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- Services]
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+ link:services.html[GEMINI - Services]
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- Each element listed{nbsp} separately, with the following information:
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+ Each element listed separately, with the following information:
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- -{nbsp} *Metadata element name*{nbsp} – the name of the UK GEMINI element;
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+ -*Metadata element name* – the name of the UK GEMINI element;
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- -{nbsp} *UK GEMINI id{nbsp}* – the identifier of the UK GEMINI element; note: these
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+ - *UK GEMINI id* – the identifier of the UK GEMINI element; note: these
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do not change between versions of GEMINI; ids of deleted elements are
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not re-used.
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- -{nbsp} *Definition*{nbsp} – the formal definition of the element;
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+ - *Definition* – the formal definition of the element;
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- -{nbsp} *Purpose and meaning*{nbsp} - an explanation of what the element is, and why
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+ - *Purpose and meaning* - an explanation of what the element is, and why
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it is required
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- -{nbsp} *Obligation*{nbsp} – whether the element is mandatory, optional or
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+ - *Obligation* – whether the element is mandatory, optional or
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conditional (where the element must be supplied when stated conditions
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apply);
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- -{nbsp} *Occurrence*{nbsp} – whether the element is single-valued or can have
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+ - *Occurrence* – whether the element is single-valued or can have
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multiple values;
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- -{nbsp} *Data type*{nbsp} – the form of the entry, whether it is a character string
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+ - *Data type* – the form of the entry, whether it is a character string
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(CharacterString), real number (real), integer, code or other class.
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Where the data type is another class, it is described as a set of
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sub-elements. Examples are Distributor and Vertical extent;
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- -{nbsp} *Domain*{nbsp} – the allowable set of values;
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+ - *Domain* – the allowable set of values;
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- -{nbsp}*Guidance*{nbsp}– advice on how to complete the entry
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- [https://www.agi.org.uk/gemini/40-gemini/1047-metadata-guidelines-for-geospatial-data-resources-part-3[2]];
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+ - *Guidance* – advice on how to complete the entry
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- -{nbsp} *Comment*{nbsp} – other other information of relevance;
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+ - *Comment* – other other information of relevance;
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- -{nbsp} *Examples*
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+ - *Examples*
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- -**{nbsp} Corresponding element in{nbsp}** INSPIRE Metadata, ISO 19115:2003, ISO
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+ - Corresponding element** in INSPIRE Metadata, ISO 19115:2003, ISO
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19139:2007
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- -{nbsp} *Change history*{nbsp} – how the element has changed from v1.0 of the
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+ - *Change history* – how the element has changed from v1.0 of the
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Standard;
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- -*{nbsp} Encoding guidelines & example*{nbsp} - how to create an XML instance of
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+ - * Encoding guidelines & example* - how to create an XML instance of
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this element
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- -{nbsp} *Errors observed*{nbsp} - observations on errors noted with each element
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+ - *Errors observed* - observations on errors noted with each element
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- === [#extended]##{nbsp}5. Extended metadata
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+ == Extended metadata
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- ==== *_[#5.1]####5.1 Additional metadata elements_*
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+ === Additional metadata elements
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In many organisations, there is a need to record additional items of
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metadata to meet specific local requirements. This may be to incorporate
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particular characteristics of the data resources, or for particular
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applications. Additional metadata elements may be included in a metadata
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- implementation. These elements should be taken from ISO 19115
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- [https://www.agi.org.uk/gemini/40-gemini/1047-metadata-guidelines-for-geospatial-data-resources-part-3[18]],
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+ implementation. These elements should be taken from ISO 19115,
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which includes a comprehensive collection of metadata elements for
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geographic information, and also allows for further extensions.
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- ==== *_[#5.2]####5.2 Extension of code lists_*
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+ === Extension of code lists
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Several metadata elements specified in UK GEMINI use enumerated code
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lists. These are pre-defined sets of values identified by codes. They
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_Last updated: May 2018_
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- http://creativecommons.org/licenses/by/4.0/[image:https://i.creativecommons.org/l/by/4.0/88x31.png[Creative
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- Commons Licence]] +
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- This work is licensed under
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- a{nbsp}http://creativecommons.org/licenses/by/4.0/[Creative Commons
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- Attribution 4.0 International License]
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+ http://creativecommons.org/licenses/by/4.0/[image:https://i.creativecommons.org/l/by/4.0/88x31.png[Creative Commons Licence]] +
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+ This work is licensed under a http://creativecommons.org/licenses/by/4.0/[Creative Commons Attribution 4.0 International License]
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