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Canonical UMM-C schema definitions

Metadata LanguageThis element specifies the language used in the metadata record (i.e. English, French, Chinese, etc.).No
Metadata DatesThis element is used to identify dates when the metadata changed in some way. This element is made of two sub-elements, Type and Date.No
Directory Names

This element has been used historically by the GCMD internally to identify association, responsibility and/or ownership of the dataset, service or supplemental information. Note: This field only occurs in the DIF. When a DIF record is retrieved in the ECHO10 or ISO 19115 formats, this element will not be translated.

Entry TitleThis element describes the title of the dataset described by the metadata.Yes
DOIThis element stores the DOI (Digital Object Identifier) that identifies the dataset.Yes
Associated DOIsThis element stores the associated DOIs that identifies associated collections or other items to this collection.No
AbstractThis element provides a brief description of the dataset the metadata represents.Yes
PurposeThis element contains suggested usage for the data and/or a description for why the resource exists.No
Data LanguageThis element describes the language used in the preparation, storage, and description of the collection. It is the language of the collection data itself. It does not refer to the language used in the metadata record (although this may be the same language)No
Data DatesThis element is used to identify dates when the data or resource itself changed in some way. No
Data CenterThis element is used to identify and provide contact information for the organization responsible for originating, processing, archiving, and/or distributing the dataset being described in the metadata.  Yes
Contact Group

This element is used to provide contact information for a group associated with the dataset. 

Contact Person

This element is used to provide contact information for an individual associated with the dataset.

Collection Data TypeThis element is used to identify the collection as a Science Quality Collection or as a non-science-quality collection such as a Near Real Time collection.No
Processing LevelThis element describes an identifier indicating the level at which the data in the collection are processed, ranging from level 0 (raw instrument data at full resolution) to level 4 (model output or analysis results). Yes
Collection CitationThis element provides the information required to properly cite the collection in professional scientific literature.No
Collection Progress

This element describes the production status of the dataset.



This element describes the quality of the dataset.

Use Constraints

This element defines how data may or may not be used to assure the protection of privacy or intellectual property. This includes license information, or any special restrictions, legal prerequisites, terms and conditions, and/or limitations on using the dataset.

Access ConstraintsThis element describes any restrictions imposed on data access. Access Constraints can be described in a free text field with the option to provide an access control list (ACL) value. No
Archive and Distribution Information

This element and all of its sub elements allow a data provider to provide archive and distribution file information up front to an end user, to help them decide if they can use the product. The file information includes AverageFileSize - typically used for granules as well as file formats and other file information.

Direct Distribution InformationThe direct distribution information main element allows data providers to provide users information on getting direct access to data products that are stored in the Amazon Web Service (AWS) S3 buckets when they are initially looking at a collection. The end users get information such as the S3 credentials end point, a credential documentation URL, as well as bucket prefix names, and an AWS region.No
Publication ReferenceThis element describes key bibliographic citations pertaining to the collection.No
ISO Topic CategoryThis element identifies the topic category (or categories) from the EN ISO 19115 Topic Category Code List that pertain to a collection.No
Science KeywordsThis element enables specification of Earth Science keywords.Yes
Ancillary KeywordsThis element allows metadata authors to provide words or phrases beyond the controlled Science Keyword vocabulary, to further describe the the collection.No
Additional AttributesThis element stores the data's distinctive attributes (i.e. attributes used to describe the unique characteristics of the resource which extend beyond those defined in this mapping).No
Metadata Association

This element is used to identify other metadata resources that are dependent on or related to the data described by the metadata.

Temporal Extent

This element describes when data were acquired or collected.

Paleo Temporal CoverageThis element defines the time period for geologic and/or paleoclimate data. The element is predominantly used for data samples that originated prior to 01-01-0001. No
Temporal KeywordsThis element specifies a word or phrase which serves to summarize the temporal characteristics of a dataset.No
Spatial ExtentThis element describes the geographic coverage of the data.No
Tiling Identification SystemThis element defines a named two-dimensional tiling system related to the collection. No
Spatial InformationThis element stores information about the reference frame from which horizontal and vertical spatial domains are measured. The horizontal reference frame includes fields for Geodetic Model, Geographic Coordinates, and Local Coordinates. The Vertical reference frame includes fields for altitudes (elevations) and depths.No
Location KeywordsThis element contains keywords that characterize the study area/region where data was collected.No
PlatformThis element describes the relevant platforms used to acquire the data.Yes
InstrumentThis element is used to register the device that measured or recorded the data, including direct human observation.Yes
ProjectThis element describes the scientific endeavor(s) with which the collection is associated.No
Related URLThis element describes any resource-related URLs that include project home pages, resource information pages, services, related data, archives/servers, metadata extensions, direct links to online software packages, web mapping services, links to images, documents, or other data.Yes
Short NameThis element describes the dataset short name.Yes
VersionThis element describes the dataset version.Yes
Version DescriptionThis element describes the version of the dataset.No
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