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  Table of contents
      
              Topics Collected
Broad scope
The Ag Data Commons includes data resources from a range of research domains that relate to agriculture. These include subjects such as agronomy, genomics, hydrology, soils, agro-ecosystems, sustainability science, and economic statistics. Data included in the Ag Data Commons received partial or full USDA funding or support.
Subject range
Ag Data Commons data materials support agricultural policy, research, scholarship, or teaching. Data accepted into the Ag Data Commons includes subject content as identified by the scope of the general USDA National Agricultural Library Collection Development Policy.
Geographic range
The Ag Data Commons collection focuses on United States agriculture and related topics. A review may justify inclusion of worldwide data displaying application to U.S. agricultural issues.
Chronological range
The Ag Data Commons focuses on current research data. A review may justify inclusion of historic data displaying application to current agricultural issues.
Language
The Ag Data Commons currently supports and accepts English language data submission and retrieval.
Formats Collected
Preferred file formats
Users may submit data in a standard format accessible through current file viewers. The Ag Data Commons strongly encourages data submitted in open and machine-readable formats such as CSV. The Ag Data Commons discourages non-machine-readable formats such as PDF. The Ag Data Commons reserves the right to re-format any submitted data. Ag Data Commons curators may reformat data at their discretion for preservation purposes, or to make data reusable by a diverse set of users.
Excluded file formats
The Ag Data Commons does not permit executable files uploaded directly or zipped, including .exe, .bat, .ipa, . reg, etc.
Types of Materials Collected
All dataset records created on the Ag Data Commons must include at least one of the following: Dataset, Database, or Software tool.
Datasets
Datasets comprise most of the Ag Data Commons collection and represent many types of data. For instance, dataset may contain tabular data corresponding to a particular experiment or event, genomic sequences and assemblies, or multimedia materials including photo, video, design, and three-dimensional digital renderings.
Databases
Database materials include organized collections of data, typically structured to support processes requiring information search and retrieval. Submitters can directly upload databases to the Ag Data Commons, but the Ag Data Commons entries of this nature typically link to an outside source or distributor.
Software tools
Software tools include materials created to help users process, model, navigate, and generally get the most out of datasets or databases. Tools included in the Ag Data Commons relate to datasets or databases embodying the Agricultural Research Service mission. Software tools usually link to externally hosted open-source code.
Exceptions
The Ag Data Commons reserves the right to include digital objects not explicitly mentioned in this document. Curators may deem objects that do not meet the basic criteria for inclusion add value to the agricultural research community or choose to include materials for preservation purposes. The Ag Data Commons curators reserve the right to re-evaluate the collection and user needs and amend the list of acceptable formats and types of materials included in the collection.&nbs;
Types of Materials Excluded
Physical materials
The Ag Data Commons may contain historic datasets of various origins, but only if data holders convert data to a current digital format. Digitization standards for materials should reflect the best practices of that material type.
Research products without data
The Ag Data Commons welcomes previously unpublished research products generated from data (e.g., tables, charts, figures), but only in conjunction with the full set of supporting data files.
Presentations
These materials include digital slide decks and recorded conference or meeting presentations from agriculture-related seminars and events. The Related Content metadata section may link to presentations related to the data.
Permissions and Copyright
License
Data holders who submit research materials to the Ag Data Commons certify they possess adequate permissions to share this data publicly. Submitters must specify the data author(s) / creator(s) and copyright status at the time they submit the data. The Ag Data Commons encourages the Creative Commons CCZero public domain dedication for submitted data, but accepts data that complies with US Federal Open Data policies. The Ag Data Commons functions as a site for data sharing and re-use and excludes data with burdensome restrictions.
Accessioning and Retention
Essential metadata fields
All records ingested into the Ag Data Commons contain a core set of essential metadata fields. The Ag Data Commons publishes current expectations for metadata in the Submission Manual. These fields allow curation staff to complete workflow for a variety of services available through the National Agricultural Library. Curation staff encourage additional metadata information, if available, to make submitted data more easily findable and reusable.
Manual data submission
Registered users may submit dataset records to the Ag Data Commons through the online submission form. Ag Data Commons curators review all manual submissions prior to publication. Curators may follow up with data submitters to complete missing information to meet the standards set for inclusion in the catalog.
Harvested records and data
As a generalist ag repository, the Ag Data Commons recommends data producers deposit their data in subject-specific repositories whenever possible to produce data and metadata in keeping with each research community’s standards. However, the Ag Data Commons may also choose to harvest dataset records and accompanying data files from external catalogs or repositories. Top criteria for developing a harvest includes a source catalog that contains a significant number of USDA-funded dataset records. If the source catalog contains records from a variety of agencies or funders and/or a variety of product types, the source must have or be willing to develop a mechanism to filter appropriate records to include only datasets supported by the USDA.
Prior to initiating a harvest, the source repository and Ag Data Commons must plan for an ongoing working relationship. All parties must agree in advance on services to be performed or delivered. The source catalog must provide the Ag Data Commons with their full contact information including name, email, phone number, and any other relevant information for the person(s) responsible for coordinating and developing the harvest.
The source catalog must have or be willing to build a machine-readable endpoint such as an API or web service which allows automated access from the Ag Data Commons platform. This provides a mechanism for transferring metadata and data as needed. The Ag Data Commons prefers for source catalogs to push their information whenever possible.
The designated essential metadata fields pertain to harvests as well as manually submitted datasets. Source catalogs lacking essential information must add the necessary information to the records at the source or agree on a hard-coded value that applies to a specific field for all records at the time of ingest (e.g., hard code License for all ingested records to U.S. Public Domain). Ag Data Commons metadata librarians will work in conjunction with the source representatives to map information accurately between the two catalogs. Users can download a copy of the Ag Data Commons metadata schema to plan these mappings.
The Ag Data Commons and source repository must agree in advance on a schedule for harvesting metadata records, as well as for harvesting scheduled copies of data files in the case where datasets receive an Ag Data Commons DOI.
PID assignment
The Ag Data Commons will reserve a Digital Object Identifier (DOI) for all records with locally held files. All other records will receive Handle identifiers.
The Ag Data Commons does not delete or un-publish metadata records containing PIDs we issue. Under exceptional circumstances, a data resource within a record may be un-published due to legal obligations on behalf of the original publisher, owner, copyright holder or author(s); or on moral or ethical grounds if data with an error or sensitive information could be potentially damaging. The metadata record intends to provide accurate information as of the last data publish date, and updates occur as needed. Therefore, the PIDs will always resolve to their Ag Data Commons metadata record pages regardless of the state of the source data and/or external links.
Record updates
Versioning
Users may amend or update data or metadata content as needed and resubmit changes for review and publication. Changes to published records or files may trigger a new version of the dataset within the existing record. See Figshare’s versioning information for more details on revisions that trigger new versions. The Ag Data Commons curation staff reserves the right to update datasets as needed to correct for broken links, outdated information, or other factors.
Proactive link maintenance
The source database manager bears responsibility to alert the Ag Data Commons prior to any changes in URL or data location for Ag Data Commons catalog records. This action mitigates the sudden discovery of broken data links. The Ag Data Commons also checks links on a regular basis to ensure they resolve.
If a link to a data resource fails to resolve, the Ag Data Commons will contact the designated person on file for that data to rectify the issue. If communication with the designated database manager or data contact does not remedy a broken link in a timely manner, curators will remove the broken link from the resource and treat any locally stored data copies, if any, as the only available data resource. In the absence of local records, Ag Data Commons curators will convert the record to a metadata-only page to indicate data are no longer available. If the data manager provides a more specific reason for the data or web site’s removal, the record owner or Ag Data Commons curators may add that information to the description field of the metadata record for clarity.
Retention
Upon acceptance into the Ag Data Commons, the Ag Data Commons retains all objects in the collection for at least 10 years and in accordance with the USDA National Agricultural Library's Collection Policy. The Ag Data Commons does not serve as a temporary storage facility for digital items. The Ag Data Commons reserves the right to maintain a backup copy of externally hosted data for archival and/or versioning purposes but does not guarantee the persistence and preservation of data and other resources hosted elsewhere. The National Agricultural Library reserves the right to remove items from the collection for any reason, including but not limited to copyright or other legal restrictions, outdated or older versions of materials, decreased relevance to the Agricultural Research Service mission, and changes in user information needs.Page Content Curated By
    

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