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Diff for: docs/1049-metadata-guidelines-for-geospatial-data-resources-part-2.asciidoc

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== Metadata Guidelines for Geospatial Data Resources Part 2
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= Metadata Guidelines for Geospatial Data Resources Part 2
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include::./includes/attributes.asciidoc[]
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=== Creating metadata using UK GEMINI (v2.3) May 2018 -{nbsp}_being revised_
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Creating metadata using UK GEMINI (v2.3) May 2018 -{nbsp}_being revised_
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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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2.3 home page]
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Return to link:1037-uk-gemini-standard-and-inspire-implementing-rules[GEMINI 2.3 home page]
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https://www.agi.org.uk/gemini/40-gemini/1049-metadata-guidelines-for-geospatial-data-resources-part-2#Intro[1.
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Introduction]
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:sectnums:
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:sectnumlevels: 3
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https://www.agi.org.uk/gemini/40-gemini/1049-metadata-guidelines-for-geospatial-data-resources-part-2#gemini[2.
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GEMINI2]
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https://www.agi.org.uk/gemini/40-gemini/1049-metadata-guidelines-for-geospatial-data-resources-part-2#2.1[2.1
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Metadata elements]
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https://www.agi.org.uk/gemini/40-gemini/1049-metadata-guidelines-for-geospatial-data-resources-part-2#2.2[2.2
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Additional metadata elements]
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https://www.agi.org.uk/gemini/40-gemini/1049-metadata-guidelines-for-geospatial-data-resources-part-2#2.3[2.3
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Extension code lists]
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https://www.agi.org.uk/gemini/40-gemini/1049-metadata-guidelines-for-geospatial-data-resources-part-2#errors[3.
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Possible metadata errors]
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https://www.agi.org.uk/gemini/40-gemini/1049-metadata-guidelines-for-geospatial-data-resources-part-2#3.1[3.1
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Impact of metadata errors]
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https://www.agi.org.uk/gemini/40-gemini/1049-metadata-guidelines-for-geospatial-data-resources-part-2#3.2[3.2
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Effect on searches]
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https://www.agi.org.uk/gemini/40-gemini/1049-metadata-guidelines-for-geospatial-data-resources-part-2#3.3[3.3
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Prevention and correction of errors]
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https://www.agi.org.uk/gemini/40-gemini/1049-metadata-guidelines-for-geospatial-data-resources-part-2#3.4[3.4
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Common errors]
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https://www.agi.org.uk/gemini/40-gemini/1049-metadata-guidelines-for-geospatial-data-resources-part-2#guidance[4.
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Guidance for individual metadata elements]
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=== Preface
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*Preface*
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This is the second part of a set of guidelines for metadata for
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geospatial data resources. These metadata guidelines are primarily
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guidance on quality management such that they could be used in the
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context of a national metadata service.
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https://www.agi.org.uk/gemini/40-gemini/1052-metadata-guidelines-for-geospatial-data-resources-part-1[Part
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1 of the Guidelines{nbsp}]covers the basics of metadata and provides an
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link:1052-metadata-guidelines-for-geospatial-data-resources-part-1[Part
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1 of the Guidelines] covers the basics of metadata and provides an
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introduction to the other two parts. It includes a glossary of terms and
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set of references. Part 3
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[https://www.agi.org.uk/gemini/40-gemini/1047-metadata-guidelines-for-geospatial-data-resources-part-3[3]]
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set of references. https://www.agi.org.uk/wp-content/uploads/2020/12/METADATAGUIDELINESPART32015-04.pdf[Part 3]
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deals with metadata quality and covers quality evaluation and quality
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management of metadata including guidance on establishing acceptable
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quality levels. This Part of the Guidelines provides a set of detailed
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Any comments on these guidelines or on the UK GEMINI2 metadata standard
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should be sent
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=== [#intro]##{nbsp}1. Introduction
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== Introduction
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UK GEMINI2 defines a core set of metadata elements for discovery of data
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resources and other essential purposes. It provides details of what
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area. The data resources may be graphical or textual (tabular or free
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text), hardcopy or digital.
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This part of the{nbsp}_Metadata Guidelines for Geospatial Data
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Resources_{nbsp}provides detailed guidance for the application of UK GEMINI2.
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This part of the _Metadata Guidelines for Geospatial Data Resources_ provides detailed guidance for the application of UK GEMINI2.
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It is aimed at those creating metadata conforming to UK GEMINI2. This
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expands on existing guidance given in the UK GEMINI2
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specification[https://www.agi.org.uk/gemini/40-gemini/1047-metadata-guidelines-for-geospatial-data-resources-part-3[4]].
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specification.
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It also describes possible errors that might occur in such metadata and
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suggests actions to guard against them. It explains how to expand the
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metadata elements in addition to those in UK GEMINI2 if required, and
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This Part should be read in conjunction with the other parts of these
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guidelines.
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=== [#gemini]##{nbsp}2. GEMINI2
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== GEMINI2
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==== *_[#2.1]####2.1 Metadata elements_*
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=== Metadata elements
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UK GEMINI2 specifies a set of metadata elements for describing
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geospatial data resources. These resources may be a dataset, data set
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series (collection of datasets with a common specification) or data
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service. The type of resource is identified in the element Resource Type
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(39). The metadata elements are summarised
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in{nbsp}https://www.agi.org.uk/gemini/40-gemini/1250-element-summary[element
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summary].
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(39). The metadata elements are summarised in link:1250-element-summary[element summary].
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Detailed guidance on how to create each of these elements can be found
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here:
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https://www.agi.org.uk/gemini/40-gemini/1027-citizens-as-sensors-a-solution-to-pollution[GEMINI
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- Datasets and data series]
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link:datasets.html[GEMINI - Datasets and data series]
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GEMINI - Services
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link:services.html[GEMINI - Services]
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==== *_[#2.2]####2.2 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
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19115{nbsp}_Geographic information -
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Metadata{nbsp}_[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 19115:2003 _Geographic information - Metadata_,
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which includes a comprehensive collection of metadata elements for
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geographic information. An example would be Dataset character set and
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Metadata character set where non-standard characters are used.
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==== *_[#2.3]####2.3 Extension of code lists_*
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=== Extension of code lists
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Several of the metadata elements specified in UK GEMINI2 use enumerated
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code lists. These are pre-defined sets of values identified by codes.
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Such code extensions may be either specific to a metadata implementation
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in an organisation or sector, or for general usage. In the latter case,
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proposed new codes should be submitted
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for inclusion in the next version of UK GEMINI2. It is expected that
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future editions of UK GEMINI will incorporate such modified code lists.
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*Note that any new code values cannot be used in a national metadata
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service until incorporated in the Standard, neither will they be valid
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for the purposes of INSPIRE.*
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=== [#errors]##{nbsp}3. Possible metadata errors
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== Possible metadata errors
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==== *_[#3.1]####3.1 Impact of metadata errors_*
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=== Impact of metadata errors
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Errors having the greatest impact are likely to be those that affect
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searches based on:
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categorisation of data subject or topic, will further erode the quality
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of the discovery service.
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==== *_[#3.2]####3.2 Effect on searches_*
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=== Effect on searches
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Having discovered a number of candidate data resources, the discovery
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service user then assesses the likelihood that any of these meet their
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details.
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==== *_[#3.3]####3.3 Prevention and correction of errors_*
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=== Prevention and correction of errors
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Prevention and correction of these errors is usually a combination of:
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* Overall quality assurance process which reviews procedures in the
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Further guidance on how to prevent and correct errors is given in Part 3
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[https://www.agi.org.uk/gemini/40-gemini/1047-metadata-guidelines-for-geospatial-data-resources-part-3[3]]{nbsp}of
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these Guidelines.
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Further guidance on how to prevent and correct errors is given in https://www.agi.org.uk/wp-content/uploads/2020/12/METADATAGUIDELINESPART32015-04.pdf[Part 3] of these Guidelines.
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==== *_[#3.4]####3.4 Common errors_*
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=== Common errors
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Some common errors that lead to inconsistent results when searching
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across metadatasets are:
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Have clear guidance on the “chunking” of data resources for individual
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documentation[See{nbsp}https://www.agi.org.uk/gemini/40-gemini/1052-metadata-guidelines-for-geospatial-data-resources-part-1[Part
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1 of these Guidelines]] based on:
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documentation (See link:1052-metadata-guidelines-for-geospatial-data-resources-part-1[Part
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1 of these Guidelines]) based on:
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. how the data is used (stand-alone or as part of wider set);
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. continuity and extent of coverage;
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. date of capture or maintenance;
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. topics or subjects covered, and
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. uniformity of specification within data resource.
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<br/>
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Introduce checks to ensure consistency of approach across all metadata.
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|Extent over-generalised |This particularly applies when extent is
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administrative areas) then any guidance should cover the possible need
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for inclusion of levels in the hierarchy.
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Introduce checks to ensure consistency of approach across all metadata.
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|Subjects and topic categories under-reported |This particularly applies
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Use closed lists wherever possible and discourage the use of free text.
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Introduce checks to ensure consistency of approach across all metadata.
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|Incorrect or inconsistent date entries a|
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There is often confusion between the date that the data was current, the
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data resource was released, published or made available.
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++++
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There can be further inconsistencies between the frequency of update and
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the recorded currency of the data resource. This can lead to {nbsp} false
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returns for searches based on dates.
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Use guidance on the recording of different dates to promote consistency.
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Introduce checks, preferably by software, to ensure that the ordering of
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dates is consistent.
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misinterpretation of results. |National Grid, British National Grid,
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|Missing values |Omission of values relating to extent, date or topic
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Use guidance on the definition and use of the metadata elements
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especially those most commonly confused (see examples).
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|Values incorrect, incomplete or inaccurate |This can apply to both
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|Use guidance and checklists for compiling entries e.g. abstracts.
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|===
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=== [#guidance]####4. Guidance for individual metadata elements
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== Guidance for individual metadata elements
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Detailed guidance on how to create each of these elements can be found
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here:
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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 data series]
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link:datasets.html[GEMINI - Datasets and data 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 metadata element is listed{nbsp}separately, as described
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in{nbsp}https://www.agi.org.uk/gemini/40-gemini/1244-uk-gemini-introduction#4.3[UK
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GEMINI Introduction].
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Each metadata element is listed separately, as described
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in link:1051-uk-gemini-v2-2-specification-for-discovery-metadata-for-geospatial-resources.html#4.3[UK GEMINI Introduction].
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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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