The 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.
There are multiple sub-elements that comprise Direct Distribution Information:
Region: Defines the possible values for the Amazon Web Service US Regions where the data product resides. The current valid values are: us-east-1, us-east-2, us-west-1, and us-west-2.
S3BucketAndObjectPrefixNames: Defines the possible values for the Amazon Web Service US S3 bucket and/or object prefix names.
S3CredentialsAPIEndpoint: Defines the URL where the credentials are stored.
S3CredentialsAPIDocumentationURL: Defines the URL where the credential documentation is stored.
Each of these elements describes the information that is necessary to pull out data products that are stored in the AWS cloud using a S3 URL that is located inside each granule's (data product file's) metadata.
Examples:
Region: "us-east-1"
S3BucketAndObjectPrefixNames: "Bucket 1"
S3CredentialsAPIEndpoint: "https://some-data-product-credentials-api.com/api.html"
S3CredentialsAPIDocumentationURL: "https://some-data-product-credentials-api.com/docs.html"
Cardinality of Direct Distribution Information:
Model | Element | Type | Usable Valid Values | Constraints | Required? | Cardinality | Notes |
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UMM-C | DirectDistributionInformation/ Region | String | us-east-1 us-east-2 us-west-1 us-west-2 | n/a | Yes | 1 | |
UMM-C | DirectDistributionInformation/ S3BucketAndObjectPrefixNames | String | n/a | 1 - 1024 characters | No | 0..* | |
UMM-C | DirectDistributionInformation/ S3CredentialsAPIEndpoint | URI | n/a | 1 - 1024 characters | Yes | 1 | |
UMM-C | DirectDistributionInformation/ S3CredentialsAPIDocumentationURL | URI | n/a | 1 - 1024 characters | Yes | 1 |
All metadata entering the CMR goes through the below process to ensure metadata quality requirements are met. All records undergo CMR validation before entering the system. The process of QA/QC is slightly different for NASA and non-NASA data providers. Non-NASA providers include interagency and international data providers and are referred to as the International Directory Network (IDN).
Please see the expandable sections below for flowchart details.
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ARC Automated Checks ARC uses the pyQuARC library for automated metadata checks. Please see the pyQuARC GitHub for more information. |
DIF 10The definitions are the same between UMM-C and ECHO 10.
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ECHO 10The definitions are the same between UMM-C and ECHO 10.
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ISO 19115-2 MENDSArchive and Distribution Information is an optional metadata element in ISO 19115-2 MENDS.
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ISO 19115-2 SMAP
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None
Future Mappings
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Version | Date | What Changed |
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1.16.0 | 03/24/2021 | This element was added to the UMM-C specification. |
Version | Date | What Changed | Author |
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1.0 | 6/30/21 | Recommendations/priority matrix transferred from internal ARC documentation to wiki space |