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Aug 17, 2021
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Add relation type processing-expression #5

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1 change: 1 addition & 0 deletions CHANGELOG.md
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Expand Up @@ -9,6 +9,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
### Added

- `processing:expression` to describe how the data has been processed.
- Relation type `processing-expression` to externally describe how the data has been processed.

### Changed

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9 changes: 5 additions & 4 deletions README.md
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Expand Up @@ -30,7 +30,7 @@ for the `providers` that have the role `producer` or `processor` assigned.

| Field Name | Type | Description |
| ----------------------- | ------------------- | ----------- |
| processing:expression | [Expression Object](#expression-object) | An expression or processing chain that describes how the data has been processed. |
| processing:expression | [Expression Object](#expression-object) | An expression or processing chain that describes how the data has been processed. Alternatively, you can also link to a processing chain with the relation type `processing-expression` (see below). |
| processing:lineage | string | Lineage Information provided as free text information about the how observations were processed or models that were used to create the resource being described [NASA ISO](https://wiki.earthdata.nasa.gov/display/NASAISO/Lineage+Information). For example, `GRD Post Processing` for "GRD" product of Sentinel-1 satellites. [CommonMark 0.29](https://commonmark.org/) syntax MAY be used for rich text representation. |
| processing:level | string | The name commonly used to refer to the processing level to make it easier to search for product level across collections or items. The short name must be used (only `L`, not `Level`). See the [list of suggested processing levels](#suggested-processing-levels). |
| processing:facility | string | The name of the facility that produced the data. For example, `Copernicus S1 Core Ground Segment - DPA` for product of Sentinel-1 satellites. |
Expand Down Expand Up @@ -85,9 +85,10 @@ Potential expression formats with examples:
The following types should be used as applicable `rel` types in the
[Link Object](https://github.com/radiantearth/stac-spec/tree/master/item-spec/item-spec.md#link-object).

| Type | Description |
| ------------ | ------------------------------------------------------------ |
| derived_from | URL to a STAC Item that was used as input data in the creation of this Item. |
| Type | Description |
| --------------------- | ------------------------------------------------------------ |
| derived_from | URL to a STAC Item that was used as input data in the creation of this Item. |
| processing-expression | A processing chain (or script) that describes how the data has been processed. |

## Contributing

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