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    <Identification_Area>
        <logical_identifier>urn:nasa:pds:context:investigation</logical_identifier>
        <version_id>22.6</version_id>
        <title>urn:nasa:pds:context:investigation:* context products</title>
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        <product_class>Product_Collection</product_class>
        <Citation_Information>
            <publication_year>2026</publication_year>
            <description>The PDS4 Context Products for Investigations, e.g. Mars2020 mission, IRTF observing campaign</description>
            <List_Author>
                <Organization>
                    <organization_name>PDS Data Design Working Group (DDWG)</organization_name>
                </Organization>
            </List_Author>
            <List_Editor>
                <Organization>
                    <organization_name>PDS Change Control Board (CCB)</organization_name>
                </Organization>
            </List_Editor>
        </Citation_Information>
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            <Modification_Detail>
                <modification_date>2026-07-11</modification_date>
                <version_id>22.6</version_id>
                <description>added:
  P,urn:nasa:pds:context:investigation:mission.bopps::1.2
dropped:
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            </Modification_Detail>
            <Modification_Detail>
                <modification_date>2026-07-08</modification_date>
                <version_id>22.5</version_id>
                <description>added:
  P,urn:nasa:pds:context:investigation:individual.frankenspectra::2.2
  P,urn:nasa:pds:context:investigation:individual.greeley_35mm_slides::2.2
  P,urn:nasa:pds:context:investigation:individual.lab_atm-opt-const-titan::1.0
  P,urn:nasa:pds:context:investigation:individual.lunar_simulants_fuv_reflectance_gimar_22::2.2
  P,urn:nasa:pds:context:investigation:individual.xas_synthesized_glasses::2.2
  P,urn:nasa:pds:context:investigation:mission.apex::1.0
  P,urn:nasa:pds:context:investigation:mission.apollo_17::2.3
  P,urn:nasa:pds:context:investigation:mission.cassini-huygens::1.5
  P,urn:nasa:pds:context:investigation:mission.dscovr::1.0
  P,urn:nasa:pds:context:investigation:mission.venera_15::1.1
  P,urn:nasa:pds:context:investigation:mission.venera_16::1.1
  P,urn:nasa:pds:context:investigation:mission.voyager::1.3
  P,urn:nasa:pds:context:investigation:observing_campaign.atlas::1.1
  P,urn:nasa:pds:context:investigation:other_investigation.relab_speclib::2.2
dropped:
  P,urn:nasa:pds:context:investigation:individual.frankenspectra::2.1
  P,urn:nasa:pds:context:investigation:individual.greeley_35mm_slides::2.1
  P,urn:nasa:pds:context:investigation:individual.lunar_simulants_fuv_reflectance_gimar_22::2.1
  P,urn:nasa:pds:context:investigation:individual.xas_synthesized_glasses::2.1
  P,urn:nasa:pds:context:investigation:mission.apollo_17::2.1
  P,urn:nasa:pds:context:investigation:mission.cassini-huygens::1.4
  P,urn:nasa:pds:context:investigation:mission.chandrayaan-3::1.0
  P,urn:nasa:pds:context:investigation:mission.pre-magellan::1.2
  P,urn:nasa:pds:context:investigation:mission.venera_15::1.0
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  P,urn:nasa:pds:context:investigation:observing_campaign.atlas::1.0
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            <Modification_Detail>
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                <version_id>22.4</version_id>
                <description>added:
  P,urn:nasa:pds:context:investigation:mission.clipper::2.0
  P,urn:nasa:pds:context:investigation:mission.clps_to_19d::1.0
dropped:
  P,urn:nasa:pds:context:investigation:mission.chandrayaan-1::1.2
  P,urn:nasa:pds:context:investigation:mission.clipper::1.1</description>
            </Modification_Detail>
            <Modification_Detail>
                <modification_date>2025-09-10</modification_date>
                <version_id>22.3</version_id>
                <description>
added:
  P,urn:nasa:pds:context:investigation:individual.atmospheric_modeling_annex::1.0
  P,urn:nasa:pds:context:investigation:mission.clps_to_prime1::1.0
  P,urn:nasa:pds:context:investigation:mission.vega_1::1.3
  P,urn:nasa:pds:context:investigation:mission.vega_2::1.3
  P,urn:nasa:pds:context:investigation:mission.venera_10::1.0
  P,urn:nasa:pds:context:investigation:mission.venera_11::1.0
  P,urn:nasa:pds:context:investigation:mission.venera_13::1.1
  P,urn:nasa:pds:context:investigation:mission.venera_14::1.0
  P,urn:nasa:pds:context:investigation:mission.venera_15::1.0
  P,urn:nasa:pds:context:investigation:mission.venera_16::1.0
  P,urn:nasa:pds:context:investigation:mission.venera_2::1.0
  P,urn:nasa:pds:context:investigation:mission.venera_3::1.0
  P,urn:nasa:pds:context:investigation:mission.venera_4::1.0
  P,urn:nasa:pds:context:investigation:mission.venera_5::1.0
  P,urn:nasa:pds:context:investigation:mission.venera_6::1.0
  P,urn:nasa:pds:context:investigation:mission.venera_7::1.0
  P,urn:nasa:pds:context:investigation:mission.venera_8::1.0
  P,urn:nasa:pds:context:investigation:mission.venera_9::1.1
dropped:
  P,urn:nasa:pds:context:investigation:mission.slim::1.0
  P,urn:nasa:pds:context:investigation:mission.vega_1::1.2
  P,urn:nasa:pds:context:investigation:mission.vega_2::1.2
  P,urn:nasa:pds:context:investigation:mission.venera_13::1.0
  P,urn:nasa:pds:context:investigation:mission.venera_15_and_16::1.1
  P,urn:nasa:pds:context:investigation:mission.venera_9::1.0</description>
            </Modification_Detail>
            <Modification_Detail>
                <modification_date>2025-07-26</modification_date>
                <version_id>22.2</version_id>
                <description>
added:
  P,urn:nasa:pds:context:investigation:mission.chandrayaan-3::1.0
  P,urn:nasa:pds:context:investigation:mission.juno::2.3
  P,urn:nasa:pds:context:investigation:mission.mariner67::1.0
  P,urn:nasa:pds:context:investigation:mission.slim::1.0
dropped:
  P,urn:nasa:pds:context:investigation:field_campaign.dd_nnss-nv_2019::1.0
  P,urn:nasa:pds:context:investigation:mission.juno::2.2</description>
            </Modification_Detail>
            <Modification_Detail>
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                <version_id>22.1</version_id>
                <description>
added:
  P,urn:nasa:pds:context:investigation:field_campaign.dd_eldorado_nv_2015::1.1
  P,urn:nasa:pds:context:investigation:field_campaign.dd_nnss-nv_2019::1.2
  P,urn:nasa:pds:context:investigation:individual.arecibo_radar_imaging_and_doppler_spectroscopy::1.1
  P,urn:nasa:pds:context:investigation:individual.campbell_venus_radar::2.1
  P,urn:nasa:pds:context:investigation:individual.carbonate_refractive_indices::2.1
  P,urn:nasa:pds:context:investigation:individual.catalina_sky_survey::1.1
  P,urn:nasa:pds:context:investigation:individual.frankenspectra::2.1
  P,urn:nasa:pds:context:investigation:individual.goldstone_raw_radar::1.1
  P,urn:nasa:pds:context:investigation:individual.greeley_35mm_slides::2.1
  P,urn:nasa:pds:context:investigation:individual.greeley_field_amboycrater::2.1
  P,urn:nasa:pds:context:investigation:individual.lab_shocked_feldspars::3.1
  P,urn:nasa:pds:context:investigation:individual.libs_reference_database::1.0
  P,urn:nasa:pds:context:investigation:individual.lowell_observatory_near_earth_object_survey::1.1
  P,urn:nasa:pds:context:investigation:individual.lunar_simulants_fuv_reflectance_gimar_22::2.1
  P,urn:nasa:pds:context:investigation:individual.near_earth_asteroid_tracking::1.1
  P,urn:nasa:pds:context:investigation:individual.none::1.1
  P,urn:nasa:pds:context:investigation:individual.spacewatch::1.1
  P,urn:nasa:pds:context:investigation:individual.titan-material-database::1.1
  P,urn:nasa:pds:context:investigation:individual.xas_synthesized_glasses::2.1
  P,urn:nasa:pds:context:investigation:individual_investigation.lab.hydrocarbon_spectra::1.1
  P,urn:nasa:pds:context:investigation:mission.2001_mars_odyssey::2.1
  P,urn:nasa:pds:context:investigation:mission.apollo_11::2.1
  P,urn:nasa:pds:context:investigation:mission.apollo_12::2.1
  P,urn:nasa:pds:context:investigation:mission.apollo_14::2.1
  P,urn:nasa:pds:context:investigation:mission.apollo_15::2.1
  P,urn:nasa:pds:context:investigation:mission.apollo_16::2.1
  P,urn:nasa:pds:context:investigation:mission.apollo_17::2.1
  P,urn:nasa:pds:context:investigation:mission.bopps::1.1
  P,urn:nasa:pds:context:investigation:mission.cassini-huygens::1.4
  P,urn:nasa:pds:context:investigation:mission.chandrayaan-1::1.2
  P,urn:nasa:pds:context:investigation:mission.clipper::1.1
  P,urn:nasa:pds:context:investigation:mission.clps_to_2ab::2.1
  P,urn:nasa:pds:context:investigation:mission.clps_to_2im::1.1
  P,urn:nasa:pds:context:investigation:mission.comet_sl9-jupiter_collision::1.3
  P,urn:nasa:pds:context:investigation:mission.contour_mission::1.1
  P,urn:nasa:pds:context:investigation:mission.dawn_mission_to_vesta_and_ceres::1.2
  P,urn:nasa:pds:context:investigation:mission.deep_impact::1.2
  P,urn:nasa:pds:context:investigation:mission.deep_space_1::1.2
  P,urn:nasa:pds:context:investigation:mission.deep_space_program_science_experiment::1.2
  P,urn:nasa:pds:context:investigation:mission.double_asteroid_redirection_test::1.1
  P,urn:nasa:pds:context:investigation:mission.epoxi::1.2
  P,urn:nasa:pds:context:investigation:mission.galileo::1.2
  P,urn:nasa:pds:context:investigation:mission.gravity_recovery_and_interior_laboratory::2.1
  P,urn:nasa:pds:context:investigation:mission.hayabusa::2.1
  P,urn:nasa:pds:context:investigation:mission.hst::1.2
  P,urn:nasa:pds:context:investigation:mission.infrared_astronomical_satellite::2.1
  P,urn:nasa:pds:context:investigation:mission.insight::3.2
  P,urn:nasa:pds:context:investigation:mission.international_cometary_explorer::1.2
  P,urn:nasa:pds:context:investigation:mission.juno::2.2
  P,urn:nasa:pds:context:investigation:mission.kaguya::1.1
  P,urn:nasa:pds:context:investigation:mission.ladee::1.4
  P,urn:nasa:pds:context:investigation:mission.light_italian_cubesat_for_imaging_of_asteroids::1.1
  P,urn:nasa:pds:context:investigation:mission.lucy::1.2
  P,urn:nasa:pds:context:investigation:mission.lunar_crater_observation_and_sensing_satellite::2.1
  P,urn:nasa:pds:context:investigation:mission.lunar_prospector::2.1
  P,urn:nasa:pds:context:investigation:mission.lunar_reconnaissance_orbiter::2.1
  P,urn:nasa:pds:context:investigation:mission.lunar_trailblazer::2.2
  P,urn:nasa:pds:context:investigation:mission.magellan::2.1
  P,urn:nasa:pds:context:investigation:mission.mariner69::2.1
  P,urn:nasa:pds:context:investigation:mission.mariner71::1.1
  P,urn:nasa:pds:context:investigation:mission.mariner_10::1.1
  P,urn:nasa:pds:context:investigation:mission.mars2020::2.1
  P,urn:nasa:pds:context:investigation:mission.mars_exploration_rover::2.1
  P,urn:nasa:pds:context:investigation:mission.mars_global_surveyor::2.1
  P,urn:nasa:pds:context:investigation:mission.mars_observer::1.1
  P,urn:nasa:pds:context:investigation:mission.mars_pathfinder::1.2
  P,urn:nasa:pds:context:investigation:mission.mars_reconnaissance_orbiter::2.1
  P,urn:nasa:pds:context:investigation:mission.mars_science_laboratory::2.1
  P,urn:nasa:pds:context:investigation:mission.maven::1.2
  P,urn:nasa:pds:context:investigation:mission.messenger::1.2
  P,urn:nasa:pds:context:investigation:mission.midcourse_space_experiment::1.2
  P,urn:nasa:pds:context:investigation:mission.near_earth_asteroid_rendezvous::1.3
  P,urn:nasa:pds:context:investigation:mission.neas::1.1
  P,urn:nasa:pds:context:investigation:mission.neowise::1.1
  P,urn:nasa:pds:context:investigation:mission.new_horizons::2.1
  P,urn:nasa:pds:context:investigation:mission.new_horizons_kem1::1.2
  P,urn:nasa:pds:context:investigation:mission.new_horizons_kem2::1.1
  P,urn:nasa:pds:context:investigation:mission.next::1.2
  P,urn:nasa:pds:context:investigation:mission.orex::1.2
  P,urn:nasa:pds:context:investigation:mission.phobos_2::1.2
  P,urn:nasa:pds:context:investigation:mission.phoenix::2.1
  P,urn:nasa:pds:context:investigation:mission.pioneer_10::1.1
  P,urn:nasa:pds:context:investigation:mission.pioneer_11::1.1
  P,urn:nasa:pds:context:investigation:mission.pioneer_8::1.1
  P,urn:nasa:pds:context:investigation:mission.pioneer_9::1.1
  P,urn:nasa:pds:context:investigation:mission.pioneer_venus::2.1
  P,urn:nasa:pds:context:investigation:mission.pre-magellan::1.2
  P,urn:nasa:pds:context:investigation:mission.psyche::1.1
  P,urn:nasa:pds:context:investigation:mission.sakigake::1.2
  P,urn:nasa:pds:context:investigation:mission.solar_and_heliospheric_observatory::1.1
  P,urn:nasa:pds:context:investigation:mission.spitzer::1.1
  P,urn:nasa:pds:context:investigation:mission.stardust::1.2
  P,urn:nasa:pds:context:investigation:mission.suisei::1.2
  P,urn:nasa:pds:context:investigation:mission.vega_1::1.2
  P,urn:nasa:pds:context:investigation:mission.vega_2::1.2
  P,urn:nasa:pds:context:investigation:mission.venera_13::1.0
  P,urn:nasa:pds:context:investigation:mission.venera_15_and_16::1.1
  P,urn:nasa:pds:context:investigation:mission.venera_9::1.0
  P,urn:nasa:pds:context:investigation:mission.viking::2.1
  P,urn:nasa:pds:context:investigation:mission.viper::1.0
  P,urn:nasa:pds:context:investigation:mission.voyager::1.2
  P,urn:nasa:pds:context:investigation:mission.wise::1.1
  P,urn:nasa:pds:context:investigation:observing_campaign.atlas::1.0
  P,urn:nasa:pds:context:investigation:observing_campaign.earth-based-uranus-stellar-occultations::1.1
  P,urn:nasa:pds:context:investigation:observing_campaign.irtf_io::1.2
  P,urn:nasa:pds:context:investigation:observing_campaign.jupiter_support::1.2
  P,urn:nasa:pds:context:investigation:observing_campaign.lowell_uranus-neptune-photometry::1.1
  P,urn:nasa:pds:context:investigation:observing_campaign.mcmath-pierce_mercury::1.1
  P,urn:nasa:pds:context:investigation:observing_campaign.pre-magellan::1.1
  P,urn:nasa:pds:context:investigation:observing_campaign.saturn_occultation_of_28_sagittarius_1989::1.1
  P,urn:nasa:pds:context:investigation:observing_campaign.saturn_ring_plane_crossing_1995::1.2
  P,urn:nasa:pds:context:investigation:observing_campaign.saturn_small_satellite_astrometry::1.2
  P,urn:nasa:pds:context:investigation:other_investigation.astromat_data::2.1
  P,urn:nasa:pds:context:investigation:other_investigation.clps::2.1
  P,urn:nasa:pds:context:investigation:other_investigation.geodesy::1.1
  P,urn:nasa:pds:context:investigation:other_investigation.hot_ion_atmos_escape::1.1
  P,urn:nasa:pds:context:investigation:other_investigation.media.dsn::1.1
  P,urn:nasa:pds:context:investigation:other_investigation.relab_speclib::2.1
  P,urn:nasa:pds:context:investigation:other_investigation.wt_threshold::1.1
dropped:
  P,urn:nasa:pds:context:investigation:field_campaign.dd_eldorado_nv_2015::1.0
  P,urn:nasa:pds:context:investigation:individual.arecibo_radar_imaging_and_doppler_spectroscopy::1.0
  P,urn:nasa:pds:context:investigation:individual.campbell_venus_radar::1.0
  P,urn:nasa:pds:context:investigation:individual.carbonate_refractive_indices::1.0
  P,urn:nasa:pds:context:investigation:individual.catalina_sky_survey::1.0
  P,urn:nasa:pds:context:investigation:individual.frankenspectra::1.0
  P,urn:nasa:pds:context:investigation:individual.goldstone_raw_radar::1.0
  P,urn:nasa:pds:context:investigation:individual.greeley_35mm_slides::1.0
  P,urn:nasa:pds:context:investigation:individual.greeley_field_amboycrater::1.0
  P,urn:nasa:pds:context:investigation:individual.lab_shocked_feldspars::1.0
  P,urn:nasa:pds:context:investigation:individual.lab_shocked_feldspars::2.0
  P,urn:nasa:pds:context:investigation:individual.lowell_observatory_near_earth_object_survey::1.0
  P,urn:nasa:pds:context:investigation:individual.lunar_simulants_fuv_reflectance_gimar_22::1.0
  P,urn:nasa:pds:context:investigation:individual.near_earth_asteroid_tracking::1.0
  P,urn:nasa:pds:context:investigation:individual.none::1.0
  P,urn:nasa:pds:context:investigation:individual.spacewatch::1.0
  P,urn:nasa:pds:context:investigation:individual.titan-material-database::1.0
  P,urn:nasa:pds:context:investigation:individual.xas_synthesized_glasses::1.0
  P,urn:nasa:pds:context:investigation:individual_investigation.lab.hydrocarbon_spectra::1.0
  P,urn:nasa:pds:context:investigation:mission.2001_mars_odyssey::1.0
  P,urn:nasa:pds:context:investigation:mission.apollo_11::1.0
  P,urn:nasa:pds:context:investigation:mission.apollo_12::1.0
  P,urn:nasa:pds:context:investigation:mission.apollo_12::1.1
  P,urn:nasa:pds:context:investigation:mission.apollo_14::1.0
  P,urn:nasa:pds:context:investigation:mission.apollo_14::1.1
  P,urn:nasa:pds:context:investigation:mission.apollo_15::1.0
  P,urn:nasa:pds:context:investigation:mission.apollo_15::1.1
  P,urn:nasa:pds:context:investigation:mission.apollo_16::1.0
  P,urn:nasa:pds:context:investigation:mission.apollo_16::1.1
  P,urn:nasa:pds:context:investigation:mission.apollo_17::1.0
  P,urn:nasa:pds:context:investigation:mission.apollo_17::1.1
  P,urn:nasa:pds:context:investigation:mission.bopps::1.0
  P,urn:nasa:pds:context:investigation:mission.cassini-huygens::1.0
  P,urn:nasa:pds:context:investigation:mission.cassini-huygens::1.1
  P,urn:nasa:pds:context:investigation:mission.cassini-huygens::1.2
  P,urn:nasa:pds:context:investigation:mission.cassini-huygens::1.3
  P,urn:nasa:pds:context:investigation:mission.chandrayaan-1::1.0
  P,urn:nasa:pds:context:investigation:mission.chandrayaan-1::1.1
  P,urn:nasa:pds:context:investigation:mission.clipper::1.0
  P,urn:nasa:pds:context:investigation:mission.clps_to_2ab::1.0
  P,urn:nasa:pds:context:investigation:mission.clps_to_2im::1.0
  P,urn:nasa:pds:context:investigation:mission.comet_sl9-jupiter_collision::1.0
  P,urn:nasa:pds:context:investigation:mission.comet_sl9-jupiter_collision::1.1
  P,urn:nasa:pds:context:investigation:mission.comet_sl9-jupiter_collision::1.2
  P,urn:nasa:pds:context:investigation:mission.contour_mission::1.0
  P,urn:nasa:pds:context:investigation:mission.dawn_mission_to_vesta_and_ceres::1.0
  P,urn:nasa:pds:context:investigation:mission.dawn_mission_to_vesta_and_ceres::1.1
  P,urn:nasa:pds:context:investigation:mission.deep_impact::1.0
  P,urn:nasa:pds:context:investigation:mission.deep_impact::1.1
  P,urn:nasa:pds:context:investigation:mission.deep_space_1::1.0
  P,urn:nasa:pds:context:investigation:mission.deep_space_1::1.1
  P,urn:nasa:pds:context:investigation:mission.deep_space_program_science_experiment::1.0
  P,urn:nasa:pds:context:investigation:mission.deep_space_program_science_experiment::1.1
  P,urn:nasa:pds:context:investigation:mission.double_asteroid_redirection_test::1.0
  P,urn:nasa:pds:context:investigation:mission.epoxi::1.0
  P,urn:nasa:pds:context:investigation:mission.epoxi::1.1
  P,urn:nasa:pds:context:investigation:mission.galileo::1.0
  P,urn:nasa:pds:context:investigation:mission.galileo::1.1
  P,urn:nasa:pds:context:investigation:mission.gravity_recovery_and_interior_laboratory::1.0
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