cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.5281/zenodo.18666308
title: OpenKnot RNA Pseudoknots – RFDpoly 3D Structures

description: This dataset contains computationally generated RNA 3D structures resembling pseudoknot topologies that were targets of the Eterna OpenKnot competiton [1]. These structures were produced by RFDpoly [2], through base pair template-conditioned structure generation.

Each zip file contains strutures corresponding to different OpenKnot competition Rounds, and different filtering methods, described below:



round_7a__top_backbones.zipTop RNA backbones generated for OpenKnot Round 7a puzzles, ranked, filtered, and selected based on F1-score similarity between the secondary structure of a given pseudoknot puzzle and the secondary structure of the provided 3D structure.

round_7a_filtered_RFdiff_backbone_dataset.tar.gzFull set of RNA backbones generated for OpenKnot Round 7a filtered filtered by F1-score similarity between the secondary structure of a given pseudoknot puzzle and the secondary structure of the provided 3D structure.

round_7b__by_design2target.zipTop RNA backbones generated for OpenKnot Round 7b puzzles, ranked, filtered, and selected based on F1-score similarity between the secondary structure of a given pseudoknot puzzle and the secondary structure of the provided 3D structure.

round_7b__by_pred2target.zipTop RNA backbones generated for OpenKnot Round 7b puzzles, ranked, filtered, and selected based on F1-score similarity between the secondary structure of a given pseudoknot puzzle and the secondary structure of AlphaFold3-predictions [3] from NA-MPNN sequences [4] that were designed using the provided 3D structure as inputs for inverse-folding.

RFdiff_pseudocycle_pdbs.zipBonus dataset. 3D structures for custom de novo RNA pseudocycles produced by RFDpoly. These were not official targets of previous OpenKnot rounds, but were characterized via SHAPE-seq in a similar manner.


 

References:

[1]  Additional information about the Eterna OpenKnot challenge (including puzzles and secondary structures) is available at: https://eternagame.org/challenges/11843006

[2]  Favor, Andrew, Riley Quijano, Elizaveta Chernova, Andrew Kubaney, Connor Weidle, Morgan A. Esler, Lilian McHugh et al. "De novo design of RNA and nucleoprotein complexes." bioRxiv (2025): 2025-10.

 

[3] Abramson, Josh, Jonas Adler, Jack Dunger, Richard Evans, Tim Green, Alexander Pritzel, Olaf Ronneberger et al. "Accurate structure prediction of biomolecular interactions with AlphaFold 3." Nature 630, no. 8016 (2024): 493-500.

 



[4]  Kubaney, Andrew, Andrew Favor, Lilian McHugh, Raktim Mitra, Robert Pecoraro, Justas Dauparas, Cameron Glasscock, and David Baker. "RNA sequence design and protein–DNA specificity prediction with NA-MPNN." bioRxiv (2025): 2025-10.
DOI: 10.5281/zenodo.18674549
title: Datex
DOI: 10.5281/zenodo.18666307
title: OpenKnot RNA Pseudoknots – RFDpoly 3D Structures

description: This dataset contains computationally generated RNA 3D structures resembling pseudoknot topologies that were targets of the Eterna OpenKnot competiton [1]. These structures were produced by RFDpoly [2], through base pair template-conditioned structure generation.

Each zip file contains strutures corresponding to different OpenKnot competition Rounds, and different filtering methods, described below:



round_7a__top_backbones.zipTop RNA backbones generated for OpenKnot Round 7a puzzles, ranked, filtered, and selected based on F1-score similarity between the secondary structure of a given pseudoknot puzzle and the secondary structure of the provided 3D structure.

round_7a_filtered_RFdiff_backbone_dataset.tar.gzFull set of RNA backbones generated for OpenKnot Round 7a filtered filtered by F1-score similarity between the secondary structure of a given pseudoknot puzzle and the secondary structure of the provided 3D structure.

round_7b__by_design2target.zipTop RNA backbones generated for OpenKnot Round 7b puzzles, ranked, filtered, and selected based on F1-score similarity between the secondary structure of a given pseudoknot puzzle and the secondary structure of the provided 3D structure.

round_7b__by_pred2target.zipTop RNA backbones generated for OpenKnot Round 7b puzzles, ranked, filtered, and selected based on F1-score similarity between the secondary structure of a given pseudoknot puzzle and the secondary structure of AlphaFold3-predictions [3] from NA-MPNN sequences [4] that were designed using the provided 3D structure as inputs for inverse-folding.

RFdiff_pseudocycle_pdbs.zipBonus dataset. 3D structures for custom de novo RNA pseudocycles produced by RFDpoly. These were not official targets of previous OpenKnot rounds, but were characterized via SHAPE-seq in a similar manner.


 

References:

[1]  Additional information about the Eterna OpenKnot challenge (including puzzles and secondary structures) is available at: https://eternagame.org/challenges/11843006

[2]  Favor, Andrew, Riley Quijano, Elizaveta Chernova, Andrew Kubaney, Connor Weidle, Morgan A. Esler, Lilian McHugh et al. "De novo design of RNA and nucleoprotein complexes." bioRxiv (2025): 2025-10.

 

[3] Abramson, Josh, Jonas Adler, Jack Dunger, Richard Evans, Tim Green, Alexander Pritzel, Olaf Ronneberger et al. "Accurate structure prediction of biomolecular interactions with AlphaFold 3." Nature 630, no. 8016 (2024): 493-500.

 



[4]  Kubaney, Andrew, Andrew Favor, Lilian McHugh, Raktim Mitra, Robert Pecoraro, Justas Dauparas, Cameron Glasscock, and David Baker. "RNA sequence design and protein–DNA specificity prediction with NA-MPNN." bioRxiv (2025): 2025-10.
DOI: 10.15468/dl.um3x5y
title: Occurrence Download

description: A dataset containing 60 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Gentianella wrightii (A.Gray) Holub"
 ]
}

 The dataset includes 60 records from 21 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0226602-230224095556074/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.h2ban2
title: Occurrence Download

description: A dataset containing 0 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Bryozoa",
 "DatasetKey is Expertise ecologique du Golf Blue Green Grand Rodez en 2016 - Donnees espèces - Expertise Golf Blue Green Grand Rodez 2016",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "Geometry POLYGON ((-25.03991 31.75, 41.65954 31.75, 41.65954 71.53037, -25.03991 71.53037, -25.03991 31.75))"
 ]
}

 The dataset includes 0 records from 0 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0220683-230224095556074/datasets/export for details.
DOI: 10.15468/dl.mpfw3s
title: Occurrence Download

description: A dataset containing 49049 species occurrences available in GBIF matching the query:
{
 "DatasetKey" : [
 "is UCSB - University of California Santa Barbara Herbarium"
 ]
}

 The dataset includes 49049 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0105433-230530130749713/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.mbunb9
title: Occurrence Download

description: A dataset containing 0 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Bryozoa",
 "DatasetKey is Système d'Information sur la Nature et les Paysages d'Ile de France - Données de la naturaliste Giordano Charlotte provenant de la base de donnée du SINP Île-de-France CETTIA",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "Geometry POLYGON ((-25.03991 31.75, 41.65954 31.75, 41.65954 71.53037, -25.03991 71.53037, -25.03991 31.75))"
 ]
}

 The dataset includes 0 records from 0 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0220689-230224095556074/datasets/export for details.
DOI: 10.15468/dl.uara5a
title: Occurrence Download

description: A dataset containing 944 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Arthropoda",
 "DatasetKey is Diveboard - Scuba diving citizen science observations",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "Geometry POLYGON ((-25.03991 31.75, 41.65954 31.75, 41.65954 71.53037, -25.03991 71.53037, -25.03991 31.75))"
 ]
}

 The dataset includes 944 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0217186-230224095556074/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.kavmyc
title: Occurrence Download

description: A dataset containing 9 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Gentianopsis lutea (Burkill) Ma"
 ]
}

 The dataset includes 9 records from 5 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0226622-230224095556074/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.xfbjwh
title: Occurrence Download

description: A dataset containing 393 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Ehretia aquatica (Lour.) Gottschling & Hilger"
 ]
}

 The dataset includes 393 records from 58 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0105427-230530130749713/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.4gmsse
title: Occurrence Download

description: A dataset containing 2 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Fritillaria milasensis Teksen & Aytaç"
 ]
}

 The dataset includes 2 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0220685-230224095556074/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.34740/kaggle/dsv/8663820
title: ⏳ endoflife.date database (duckdb)
DOI: 10.15468/dl.f355zb
title: Occurrence Download

description: A dataset containing 3735 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Arthropoda",
 "DatasetKey is Oison : outil de saisie des observations naturalistes réalisées par les agents de l'Office français de la biodiversité (OFB) - Données d'observations \"espèce\" réalisées par des agents de l'OFB jusqu'au 31 décembre 2018.",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "Geometry POLYGON ((-25.03991 31.75, 41.65954 31.75, 41.65954 71.53037, -25.03991 71.53037, -25.03991 31.75))"
 ]
}

 The dataset includes 3735 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0217195-230224095556074/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.68558t
title: Occurrence Download

description: A dataset containing 136 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Gentianothamnus madagascariensis Humbert"
 ]
}

 The dataset includes 136 records from 11 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0226636-230224095556074/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.c757ws
title: Occurrence Download

description: A dataset containing 227 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Rothmaleria granatensis (Boiss. ex DC.) Font Quer"
 ]
}

 The dataset includes 227 records from 42 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0105416-230530130749713/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.txwcyd
title: Occurrence Download

description: A dataset containing 0 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Fimbristylis benthamiana Govind."
 ]
}

 The dataset includes 0 records from 0 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0217199-230224095556074/datasets/export for details.
DOI: 10.15468/dl.t4z64t
title: Occurrence Download

description: A dataset containing 21 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Fritillaria minima Rix"
 ]
}

 The dataset includes 21 records from 7 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0220690-230224095556074/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.2cz449
title: Occurrence Download

description: A dataset containing 165 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Seddera capensis (E.Mey. ex Choisy) Schinz"
 ]
}

 The dataset includes 165 records from 20 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0122260-230530130749713/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.jnzu5q
title: Occurrence Download

description: A dataset containing 2491 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Gentianopsis barbata (Froel.) Ma"
 ]
}

 The dataset includes 2491 records from 93 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0226604-230224095556074/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.u4zzzu
title: Occurrence Download

description: A dataset containing 6 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Country is one of (Chinese Taipei, China, Hong Kong)",
 "InstitutionCode is one of (taif, a, ca.ubc, mo, pe)",
 "OccurrenceStatus is Present",
 "TaxonKey is Kalanchoe delagoensis Eckl. & Zeyh."
 ]
}

 The dataset includes 6 records from 5 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0217198-230224095556074/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.buewz2
title: Occurrence Download

description: A dataset containing 0 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Bryozoa",
 "DatasetKey is Création du poste 225 000/20 000 volts de CONQUES SUR ORBIEL et de son raccordement au poste de MOREAU par une liaison souterraine à 225 000 volts - Faune et flore d'intérêt patrimonial",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "Geometry POLYGON ((-25.03991 31.75, 41.65954 31.75, 41.65954 71.53037, -25.03991 71.53037, -25.03991 31.75))"
 ]
}

 The dataset includes 0 records from 0 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0220692-230224095556074/datasets/export for details.
DOI: 10.15468/dl.3s354k
title: Occurrence Download

description: A dataset containing 253 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is one of (Bambusa tuldoides Munro)",
 "HasCoordinate is true"
 ]
}

 The dataset includes 253 records from 70 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0068844-240506114902167/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.m6nbzk
title: Occurrence Download

description: A dataset containing 0 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Diphasium complanatum subsp. zeilleri (Rouy) Pacyna",
 "HasCoordinate is true"
 ]
}

 The dataset includes 0 records from 0 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0219752-230224095556074/datasets/export for details.
DOI: 10.15468/dl.tjfmc5
title: Occurrence Download

description: A dataset containing 2 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Rubia aitchisonii Deb & Malick"
 ]
}

 The dataset includes 2 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0105437-230530130749713/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.8zem6f
title: Occurrence Download

description: A dataset containing 87 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Bulbophyllum apetalum Lindl."
 ]
}

 The dataset includes 87 records from 13 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0226643-230224095556074/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.3acjzu
title: Occurrence Download

description: A dataset containing 0 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Bryozoa",
 "DatasetKey is Inventaires menés dans le cadre du Groupe Invertébrés de Midi-Pyrénées (GIMP)-Données invertébrés en Midi-Pyrénées",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "Geometry POLYGON ((-25.03991 31.75, 41.65954 31.75, 41.65954 71.53037, -25.03991 71.53037, -25.03991 31.75))"
 ]
}

 The dataset includes 0 records from 0 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0220691-230224095556074/datasets/export for details.
DOI: 10.15468/dl.2rcbnj
title: Occurrence Download

description: A dataset containing 0 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Bryozoa",
 "DatasetKey is EolMed - Gruissan, Ferme Pilote d'Eoliennes Flottantes et son raccordement au Réseau Public de Transport d'Electricité - Domaine maritime",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "Geometry POLYGON ((-25.03991 31.75, 41.65954 31.75, 41.65954 71.53037, -25.03991 71.53037, -25.03991 31.75))"
 ]
}

 The dataset includes 0 records from 0 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0220693-230224095556074/datasets/export for details.
DOI: 10.15468/dl.r4b9x3
title: Occurrence Download

description: A dataset containing 1 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Rottboellia goalparensis Bor"
 ]
}

 The dataset includes 1 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0105420-230530130749713/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.vuskkv
title: Occurrence Download

description: A dataset containing 17853 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Arthropoda",
 "DatasetKey is Royal Netherlands Institute for Sea Research (NIOZ) - Kom Fyke Mokbaai",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "Geometry POLYGON ((-25.03991 31.75, 41.65954 31.75, 41.65954 71.53037, -25.03991 71.53037, -25.03991 31.75))"
 ]
}

 The dataset includes 17853 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0217227-230224095556074/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.hu27we
title: Occurrence Download

description: A dataset containing 125 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Gentianopsis stricta Ikonn."
 ]
}

 The dataset includes 125 records from 8 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0226632-230224095556074/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.zbs2ts
title: Occurrence Download

description: A dataset containing 421 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Chrysophyllum brenesii Cronquist",
 "OccurrenceStatus is Present"
 ]
}

 The dataset includes 421 records from 26 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0028758-230530130749713/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.t7af4y
title: Occurrence Download

description: A dataset containing 444812 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Country is one of (Ireland, Svalbard and Jan Mayen, Norway, Sweden, Finland, Estonia, Latvia, Denmark, Portugal, Spain, France, Germany, Netherlands, Switzerland, Austria, Italy, Greece, Türkiye, Russian Federation, Belarus, Ukraine, Poland, Czechia, Slovakia, Hungary, Romania, Bulgaria, Albania, Serbia, Slovenia, Bosnia and Herzegovina)",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "OccurrenceStatus is Present",
 "TaxonKey is Carex flacca Schreb."
 ]
}

 The dataset includes 444812 records from 2050 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0068835-240506114902167/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.jzqu8r
title: Occurrence Download

description: A dataset containing 239 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Geometry POLYGON((-118.30739 49.24884,-109.0136 49.24884,-109.0136 54.83659,-118.30739 54.83659,-118.30739 49.24884))",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "TaxonKey is Taxidea taxus"
 ]
}

 The dataset includes 239 records from 12 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0008441-260221153910048/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.y8kfwt
title: Occurrence Download

description: A dataset containing 0 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Ovatametra minima",
 "DecimalLatitude is not null",
 "DecimalLongitude is not null"
 ]
}

 The dataset includes 0 records from 0 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0008442-260221153910048/datasets/export for details.
DOI: 10.5519/qd.t7k2xgcg
title: Query on the Natural History Museum Data Portal (data.nhm.ac.uk) (5469 records)
DOI: 10.15468/dl.g77bjw
title: Occurrence Download

description: A dataset containing 11952 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Continent is North America",
 "Country is Canada",
 "StateProvince is Alberta",
 "TaxonKey is Cervidae",
 "Year 2016-2026"
 ]
}

 The dataset includes 11952 records from 2 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0008443-260221153910048/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.6084/m9.figshare.31397487
title: 摩擦本构参数

description: 论文中图像的数据来源
DOI: 10.6084/m9.figshare.31397487.v1
title: 摩擦本构参数

description: 论文中图像的数据来源
DOI: 10.15468/dl.4w6zmr
title: Occurrence Download

description: A dataset containing 3279 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Nasica longirostris",
 "Year is greater than or equal to 2000",
 "Year is less than or equal to 2026",
 "Country is Colombia",
 "HasCoordinate is true"
 ]
}

 The dataset includes 3279 records from 14 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0008445-260221153910048/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.