New schemas for statistical artefacts associated to seismic data:
1.[`osdu:wks:dataset--File.SeismicHistogram:1.0.0`](https://community.opengroup.org/osdu/data/data-definitions/-/blob/v0.21.0/E-R/dataset/File.SeismicHistogram.1.0.0.md) as dedicated dataset
(`ArtefactRole:ContentMetadata`) for histograms, which received their own content schema due to the lack of an
industry standard:
2.[`osdu:wks:content--SeismicHistogram:1.0.0`](https://community.opengroup.org/osdu/data/data-definitions/-/blob/v0.21.0/E-R/content/SeismicHistogram.1.0.0.md) - the content schema.
3. Separate datasets for legacy tape formats SEGA and SEGB:
Activity parameter lacked a specification for Boolean values. This has been added
to [`osdu:wks:AbstractActivityParameter:1.1.0`](https://community.opengroup.org/osdu/data/data-definitions/-/blob/v0.21.0/E-R/abstract/AbstractActivityParameter.1.1.0.md), which is now included
by
1.[`osdu:wks:AbstractWPCActivity:1.2.0`](https://community.opengroup.org/osdu/data/data-definitions/-/blob/v0.21.0/E-R/abstract/AbstractWPCActivity.1.2.0.md), and
3. The [`osdu:wks:work-product-component--Activity:1.3.0`](https://community.opengroup.org/osdu/data/data-definitions/-/blob/v0.21.0/E-R/work-product-component/Activity.1.3.0.md) refers now to
the latest AbstractProjectActivity. ([Detailed changes for Activity](https://community.opengroup.org/osdu/data/data-definitions/-/blob/v0.21.0/Guides/MigrationGuides/M18/Activity.1.2.0.md))
4. master-data entities referring to AbstractProjectActivity are **_not_** updated in M18; these changes will be
combined with other updates.
3.**Well Delivery**
1. New [`osdu:wks:work-product-component--TubularExternalComponent:1.0.0`](https://community.opengroup.org/osdu/data/data-definitions/-/blob/v0.21.0/E-R/work-product-component/TubularExternalComponent.1.0.0.md)
supporting external components, also known as jewellery. The new type refers to three new reference value lists, see below.
with an array of historical TubularAssemblyStates in addition to the current TubularAssemblyStatus.
3. Correction of [`osdu:wks:master-data--OperationsReport:1.3.0`](https://community.opengroup.org/osdu/data/data-definitions/-/blob/v0.21.0/E-R/master-data/OperationsReport.1.3.0.md),
see [migration information](https://community.opengroup.org/osdu/data/data-definitions/-/blob/v0.21.0/Guides/MigrationGuides/M18/OperationsReport.1.2.0.md) for details.
4.**Environmental Monitoring**<br>
New work-product-component [`osdu:wks:work-product-component--SoilGasMonitoring:1.0.0`](https://community.opengroup.org/osdu/data/data-definitions/-/blob/v0.21.0/E-R/work-product-component/SoilGasMonitoring.1.0.0.md)
_a type of environmental monitoring. Environment monitoring consists of tools, techniques and processes designed to
observe an environment and characterise its quality for the purpose of accurately quantifying the impact an activity
has on an environment. Other environmental monitoring types or techniques include air, water, contamination and
erosion monitoring. And data is typically comprised of baseline and subsequent temporal data sets._ The new type
refers to three new reference value lists, see below.
5.**Reference Data**
1.**PPDM** takes over governance for the following reference value lists by adjusting the list description and the
detailed [list of changes here](https://community.opengroup.org/osdu/data/data-definitions/-/blob/v0.21.0/Guides/MigrationGuides/M18/GrainDensityMeasurementType.1.0.0.md).
detailed [list of changes here](https://community.opengroup.org/osdu/data/data-definitions/-/blob/v0.21.0/Guides/MigrationGuides/M18/PerforationGunPhasingType.1.0.0.md).
3.[`osdu:wks:reference-data--WellboreReason:1.0.1`](https://community.opengroup.org/osdu/data/data-definitions/-/blob/v0.21.0/E-R/reference-data/WellboreReason.1.0.1.md), the previous
version was still under 'Authoring', which allows the removal of values not endorsed by
PPDM. [Detailed list of changes here](https://community.opengroup.org/osdu/data/data-definitions/-/blob/v0.21.0/Guides/MigrationGuides/M18/WellboreReason.1.0.0.md).
with changes to codes documented in [migration instructions](https://community.opengroup.org/osdu/data/data-definitions/-/blob/v0.21.0/Guides/MigrationGuides/M18/QuantitativeAccuracyBand.1.0.0.md).
and [worked examples](https://community.opengroup.org/osdu/data/data-definitions/-/blob/v0.21.0/Examples/WorkedExamples/IndexExtensions/README.md). No content is currently shipped.
Content, i.e. de-normalizations, will be defined by the consumer community.
4.**External Data Sources**<br>
Support for master data instance mapping by defining matching rules. This is facilitated by the new, LOCAL
reference value
list [`osdu:wks:reference-data--ParentMatchingRuleSets:1.0.0`](https://community.opengroup.org/osdu/data/data-definitions/-/blob/v0.21.0/E-R/reference-data/ParentMatchingRuleSets.1.0.0.md).
5. Description changes to [`osdu:wks:reference-data--ValueChainStatusType:1.0.1`](https://community.opengroup.org/osdu/data/data-definitions/-/blob/v0.21.0/E-R/reference-data/ValueChainStatusType.1.0.1.md)
schema and [values](https://community.opengroup.org/osdu/data/data-definitions/-/blob/v0.21.0/Guides/MigrationGuides/M18/ValueChainStatusType.1.0.0.md).
6.**Environmental Monitoring**<br> introduces the following new reference value lists to support SoilGasMonitoring:
_Methodology detailing how the soil gas sample was acquired._
6. Reference lists for **TubularExternalComponent**
1.[`osdu:wks:reference-data--TubularExtCompAttachMechanism:1.0.0`](https://community.opengroup.org/osdu/data/data-definitions/-/blob/v0.21.0/E-R/reference-data/TubularExtCompAttachMechanism.1.0.0.md)_List of methods used to attach external components to a tubular assembly._
2.[`osdu:wks:reference-data--TubularExtCompAttachPattern:1.0.0`](https://community.opengroup.org/osdu/data/data-definitions/-/blob/v0.21.0/E-R/reference-data/TubularExtCompAttachPattern.1.0.0.md)_List of external component placement patterns which describe frequency of the equipment being installed onto the tubular assembly._
3.[`osdu:wks:reference-data--TubularExtCompType:1.0.0`](https://community.opengroup.org/osdu/data/data-definitions/-/blob/v0.21.0/E-R/reference-data/TubularExtCompType.1.0.0.md)_List of tubular assembly external component (equipment) types for drilling, casing/liner and completion assemblies._