## Summary of Changes

- Sequence has a new home: https://gitlab.com/sequence
- The namespace has been updated from `Reductech.Sequence` to `Sequence`

### Steps

- Added `EntityValidateRelations`
- Added `Flatten`

### Other Changes

Major performance improvements.

For more details see the changelog: https://gitlab.com/sequence/core/-/blob/v0.18.0/CHANGELOG.md

## Summary of Changes

- `EntityFormat` step now accepts arrays as input
- Using empty blocks with `StringInterpolate` no longer throws errors
- Updated `JsonSchema.Net` to `3.2.0`

For more details see the changelog: https://gitlab.com/reductech/sequence/core/-/blob/v0.17.0/CHANGELOG.md

For more details see the changelog: https://gitlab.com/reductech/sequence/core/-/blob/v0.16.0/CHANGELOG.md

## Summary of Changes

### Sequence Configuration Language

- You can now use `"""` to indicate a multiline string with no escapes.
```scl
"""
{
  "Json" : "Value"
}
"""
```
- Entity Properties can now be accessed using dot notation
```scl
- <entity> = (foo: (bar: 1, baz: 2))
- Print <entity>.foo.bar
# Returns: 1
```

- Added code completion for entity property access by dot notation
- Entity type references now optionally have an associated schema which can be set by the steps which create entities and checked by steps which use those entities.
- SCL like `(foo: 1)['bar']` now results in an error when the SCL is validated, rather than when it's running

For more details see the changelog: https://gitlab.com/reductech/sequence/core/-/blob/v0.15.0/CHANGELOG.md

## Summary of Changes

### Steps

- `Transform` can now round doubles to integers. This can be controlled with the `RoundingPrecision` parameter.
- Added `Round` Step to round doubles
- `GenerateDocumentation` now takes a `RootUri` parameter.

### Sequence Configuration Language

Steps whose outputs can be determined at compile time can now be folded into constants.

### Core SDK

- Step Parameters can now have any number of `[MetadataAttribute]` which allows you to designate custom metadata about the step.
- Added an extension method to get all step parameters and values in a sequence which will allow users to check the values being passed to marked parameters in a compiled sequence.
- Environment Variables can now be injected to sequences before compiling / running.
- Added a new `Reductech.Sequence.LanguageServer` project with Language Server features

For more details see the changelog: https://gitlab.com/reductech/sequence/core/-/blob/v0.14.0/CHANGELOG.md

EDR is now Sequence. The following has changed:

- The GitLab group has moved to https://gitlab.com/reductech/sequence
- The root namespace is now `Reductech.Sequence`
- The documentation site has moved to https://sequence.sh

Everything else is still the same - automation, simplified.

The project has now been updated to use .NET 6.

## Summary of Changes

### Core SDK

- Step input and output types now have a base type of `ISCLObject`
    - This enforces that all inputs and outputs are one of the following types:
    - Unit
    - SCLNull
    - StringStream
    - SCLBool
    - SCLInt
    - SCLDouble
    - SCLDateTime
    - SCLEnum
    - SCLOneOf of ISCLObjects
    - Array of ISCLObject

### Steps

- `ArrayMap` can now map elements of one type to elements of another type.

For more details see the changelog: https://gitlab.com/reductech/sequence/core/-/blob/v0.13.0/CHANGELOG.md

For more details see the changelog: https://gitlab.com/reductech/edr/core/-/blob/v0.12.0/CHANGELOG.md

## Summary of Changes

### Sequence Configuration Language

- Added new lambda syntax for steps which take a function as a parameter.

  Instead of writing `Foreach [1,2,3] (Log <x>) <x>` you now write `Foreach [1,2,3] (<x> => Log <x>) ` or `Foreach [1,2,3] (Log <>) `

- Allowed Step Parameters to be Discriminated Unions. This allows a parameter to be e.g. either a name or an Id.

- When accessing entity properties you can now use a dot to indicate a nested property

  Instead of `(a:(b: 1))['a']['b']` you can now write `(a:(b: 1))['a.b']`

For more details see the changelog: https://gitlab.com/reductech/edr/core/-/blob/v0.11.0/CHANGELOG.md

## Summary of Changes

### Steps

- Added `ArrayGroupBy` Step

### Sequence Configuration Language

- Added the automatic variable `<>` which can be used instead of `Entity`

### Logging and Monitoring

- Added `WithCheckLogLevel` extension method to `ICaseThatExecutes` allowing the verbosity
  of the test log messages to be changed

For more details see the changelog: https://gitlab.com/reductech/edr/core/-/blob/v0.10.0/CHANGELOG.md

### Steps

- Added
  - `EvaluateArray`
  - `RunSCL`

Steps that that work with the file system and with structured data have been
moved to separate connectors:

- Moved to the [FileSystem](https://gitlab.com/reductech/edr/connectors/filesystem) Connector

  - `DirectoryCopy`
  - `DirectoryExists`
  - `DirectoryMove`
  - `CreateDirectory`
  - `FileCopy`
  - `FileExists`
  - `FileExtract`
  - `FileMove`
  - `FileRead`
  - `FileWrite`
  - `DeleteItem`
  - `PathCombine`

- Moved to the [StructuredData](https://gitlab.com/reductech/edr/connectors/structureddata) Connector
  - `FromConcordance`
  - `FromCSV`
  - `FromIDX`
  - `FromJson`
  - `FromJsonArray`
  - `ToConcordance`
  - `ToCSV`
  - `ToIDX`
  - `ToJson`
  - `ToJsonArray`

### Core SDK

- `ToJson` now formats output by default. This can be overriden by setting `FormatOutput` to false
- `ToJsonArray` now formats output by default. This can be overriden by setting `FormatOutput` to false

### Connector Updates

- Connectors can be dynamically loaded at runtime
- Connector Settings now support plugins

### Data Interchange Format

- `Schema.AllowExtraProperties` changed to `Schema.ExtraProperties` which can take `Allow`, `Warn`, `Remove`, or `Fail`

For more details see the changelog: https://gitlab.com/reductech/edr/core/-/blob/v0.9.0/CHANGELOG.md

### Steps

- Added
  - `AssertEqual`
  - `GetSettings`

For more details see the changelog: https://gitlab.com/reductech/edr/core/-/blob/v0.8.0/CHANGELOG.md

### Steps

- Added
  - GetApplicationVersion

For more details see the changelog: https://gitlab.com/reductech/edr/core/-/blob/v0.7.0/CHANGELOG.md

### Steps

- Added
  - GetConnectorInformation

### Sequence Configuration Language

- It's now possible to interpolate strings using the `$` prefix

```scala
- <First> = "John"
- <Last> = "Jones"
- <Name> = $"{<First>} {<Last>}"
```

- `EntityGetValue` can now retrieve nested entities

For more details see the changelog: https://gitlab.com/reductech/edr/core/-/blob/v0.6.0/CHANGELOG.md

### Steps

- `FromJson` now parses Json object and returns an `Entity`
- `ToJson` now takes an `Entity` and returns a Json object string
- Created `FromJsonArray`
- Created `ToJsonArray`
- [ Added `Hash` Step ](https://docs.reductech.io/edr/steps/Core/Hash.html)
- Added DirectoryMove
- Added DirectoryCopy
- Added FileMove
- Added FileCopy
- Added `EntityCombine` step 
- `Print` renamed to `Log`
- Added `Print` which writes an entity to the console
- Created `ReadStandardIn` step that returns a StringStream of data from the standard input
- Created `WriteStandardOut` step that writes a StringStream to standard output
- [ Added `RegexMatch` Step ](https://docs.reductech.io/edr/steps/Core/RegexMatch.html)
- [ Added `RegexReplace` Step ](https://docs.reductech.io/edr/steps/Core/RegexReplace.html)

### Sequence Configuration Language

- All operators can now be chained
- `+` operator can now be used for `Sum`, `StringConcatenate`, or `EntityCombine`
- The `+` operator now combines entities
- Added `Sum`, `Product`, `Subtract`, `Divide`, `Modulo` `Power`
- Added `And`, `Or`
- Added `Equals`, `NotEquals`, `LessThan`, `LessThanOrEqual`, `GreaterThan`, `GreaterThanOrEqual`
- Removed `ApplyMathOperator`, `ApplyBooleanOperator`, `Compare`
- Removed `with` keyword
- Strings can be used to name entity properties in SCL
- Commas are now optional in SCL arrays
- Enabled nested entity access in SCL e.g. `<entity>['Property.Name.Multiplicity']`
- Added Array access operator to SCL: `[1,2,3][0]`
- Added Entity access operator to SCL: `(Property: 'Value')['Property']`

### Core SDK

- Added `DateInputFormat` and `DateOutputFormat` to `SchemaProperty`
- Added `DefaultErrorBehaviour` to `Schema`
- Added `ErrorBehaviour` to `SchemaProperty `
- `IStateMonad` now implements `IAsyncDisposable` not `IDisposable`
- `IStateMonad` `GetVariable` and `SetVariable` are now Async
- External context abstracted using https://github.com/PawelGerr/Thinktecture.Abstractions

### Logging and Monitoring

- Logged messages now have the following properties: `Message` `MessageParams` `StepName` `Location` `SequenceInfo`
- Additional log messages added at the start and end of each sequence

For more details see the changelog: https://gitlab.com/reductech/edr/core/-/blob/v0.5.0/CHANGELOG.md

Major rework of the language and data streaming features so lots of **breaking changes** including:

- Moved from YAML-based configuration to a custom configuration
  language called SCL (Sequence Configuration Language)
  - Using a custom ANTLR grammar to parse the configuration language
  - The new language is similar to YAML
- Consolidated entity streams, lists and array into a single datatype - `Array<T>`
  - There are no longer separate Steps for arrays and entity streams (e.g. `ForEach`, `IsEmpty`, `Length`)
- Consolidated strings and data streams into a single datatype - `StringStream`
- Update to .NET 5.0
- Reworked logging and exceptions
  - More frequent and more consistent logging
  - Added step scopes
  - Added localization features
  - Added support for appending custom metadata
- Added steps for JSON and IDX (not breaking)
- Documentation has now been moved to https://docs.reductech.io

For more details see the changelog: https://gitlab.com/reductech/edr/core/-/blob/v0.4.0/CHANGELOG.md

Breaking changes - Step and argument names have changed to make them more
consistent. Step names now follow the convention of _NamespaceAction_, e.g.
`ArrayLength`, `ArraySort`, `EntityMap`, `EntityStreamSort`.

- Added Entities and EntityStreams along with Linq style methods to manipulate them.
- Added Entity Schemas to allow conversion between different
- Step state is now scoped and disposable
- Added Steps to convert `EntityStream` to/from concordance and CSV

For more details see the changelog: https://gitlab.com/reductech/edr/core/-/blob/v0.3.0/CHANGELOG.md

- Step test library
- Short form array declarations
- Steps now async
- ConsoleMethods have been removed

Please see the changelog for more details: https://gitlab.com/reductech/edr/core/-/blob/master/CHANGELOG.md

Release v0.2.0
For further details, please see the  epic: https://gitlab.com/groups/reductech/-/epics/5

First Release of Processes.