Initial implementation

Process/Process.Interface/Configuration/IProcessorChainConfiguration.cs

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+using System;
+using System.Collections.Generic;
+
+namespace Process.Interface.Configuration;
+
+/// <summary>
+/// Configuration interface for <see cref="IProcessorChain"/>s
+/// </summary>
+/// <typeparam name="TInput"><see cref="IProcessor{TInput,TOutput}"/> input type</typeparam>
+/// <typeparam name="TOutput"><see cref="IProcessor{TInput,TOutput}"/> output type</typeparam>
+public interface IProcessorChainConfiguration<TInput, TOutput> : IProcessorChain<TInput, TOutput>
+{
+  /// <summary>
+  /// Add the specified <paramref name="processor"/> to <see cref="IProcessor{TInput,TOutput}"/> chain
+  /// </summary>
+  /// <param name="processor">The <see cref="IProcessor{TInput,TOutput}"/> to add to the chain</param>
+  /// <returns>The <see cref="IProcessorChainConfiguration{TInput,TOutput}"/> for fluent chaining of method calls</returns>
+  IProcessorChainConfiguration<T, TOutput, TInput, TOutput> Use<T>(
+    IProcessor<TInput, T> processor
+  );
+
+  /// <inheritdoc cref="Use{T}(IProcessor{TInput,T})"/>
+  IProcessorChainConfiguration<T, TOutput, TInput, TOutput> Use<T>(
+    Func<IEnumerable<TInput>, IEnumerable<T>> processorFunc
+  );
+
+  /// <summary>
+  /// Ends the configuration process and converts the
+  /// <see cref="IProcessorChainConfiguration{TInput,TOutput}"/>
+  /// to a <see cref="IProcessorChain"/>
+  /// </summary>
+  /// <param name="processor">The <see cref="IProcessor{TInput,TOutput}"/> to add to the chain</param>
+  /// <returns>The configured <see cref="IProcessorChain{TInput,TOutput}"/></returns>
+  IProcessorChainConfiguration<TInput, TOutput> Complete(
+    IProcessor<TInput, TOutput> processor
+  );
+
+  /// <inheritdoc cref="Complete(IProcessor{TInput,TOutput})"/>
+  IProcessorChainConfiguration<TInput, TOutput> Complete(
+    Func<IEnumerable<TInput>, IEnumerable<TOutput>> processorFunc
+  );
+}
+
+/// <summary>
+/// Interface for configuring sub-steps of <see cref="IProcessorChain{TInput,TOutput}"/>s
+/// </summary>
+/// <typeparam name="TInput"><see cref="IProcessor{TInput,TOutput}"/> input type</typeparam>
+/// <typeparam name="TOutput"><see cref="IProcessor{TInput,TOutput}"/> output type</typeparam>
+/// <typeparam name="TInChain">Input type of the base <see cref="IProcessorChainConfiguration{TInput,TOutput}"/></typeparam>
+/// <typeparam name="TOutChain">Output type of the base <see cref="IProcessorChainConfiguration{TInput,TOutput}"/></typeparam>
+public interface IProcessorChainConfiguration<TInput, TOutput, TInChain, TOutChain>
+{
+  /// <summary>
+  /// Add the specified <paramref name="processor"/> to <see cref="IProcessor{TInput,TOutput}"/>
+  /// </summary>
+  /// <param name="processor">The <see cref="IProcessor{TInput,TOutput}"/> to add to the chain</param>
+  /// <returns>The <see cref="IProcessorChainConfiguration{TInput,TOutput, TInChain, TOutChain}"/> for fluent chaining of method calls</returns>
+  IProcessorChainConfiguration<T, TOutput, TInChain, TOutChain> Use<T>(
+    IProcessor<TInput, T> processor
+  );
+
+  /// <inheritdoc cref="Use{T}(IProcessor{TInput,T})"/>
+  IProcessorChainConfiguration<T, TOutput, TInChain, TOutChain> Use<T>(
+    Func<IEnumerable<TInput>, IEnumerable<T>> processorFunc
+  );
+
+  /// <summary>
+  /// Ends the configuration process and returns the base <see cref="IProcessorChainConfiguration{TInput,TOutput}"/>
+  /// to a <see cref="IProcessorChain"/>
+  /// </summary>
+  /// <param name="processor">The <see cref="IProcessor{TInput,TOutput}"/> to add to the chain</param>
+  /// <returns>The configured <see cref="IProcessorChain{TInput,TOutput}"/></returns>
+  IProcessorChain<TInChain, TOutChain> Complete(
+    IProcessor<TInput, TOutput> processor
+  );
+
+  /// <inheritdoc cref="Complete(IProcessor{TInput,TOutput})"/>
+  IProcessorChain<TInChain, TOutChain> Complete(
+    Func<IEnumerable<TInput>, IEnumerable<TOutput>> processorFunc
+  );
+}

Process/Process.Interface/IProcessor.cs

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+using System.Collections;
+using System.Collections.Generic;
+
+namespace Process.Interface;
+
+/// <summary>
+/// Common interface for <see cref="IProcessor"/>s, which
+/// are able to manipulate input data and generate an output
+/// </summary>
+public interface IProcessor
+{
+  /// <summary>
+  /// Returns an <seealso cref="IEnumerable"/>,
+  /// containing the manipulated data after this processing step
+  /// </summary>
+  /// <returns>The processed data</returns>
+  IEnumerable Process(IEnumerable inputs);
+}
+
+/// <summary>
+/// Common interface for <see cref="IProcessor"/>s, which
+/// are able to manipulate <typeparamref name="TInput"/> data and generate an <typeparamref name="TOutput"/>
+/// </summary>
+/// <typeparam name="TInput">The data type to input</typeparam>
+/// <typeparam name="TOutput">The resulting data type</typeparam>
+public interface IProcessor<in TInput, out TOutput> : IProcessor
+{
+  /// <summary>
+  /// Returns an <seealso cref="IEnumerable{T}"/>,
+  /// containing the manipulated <typeparamref name="TInput"/> data after this processing step
+  /// </summary>
+  /// <returns>The processed <typeparamref name="TOutput"/> data</returns>
+  IEnumerable<TOutput> Process(IEnumerable<TInput> inputs);
+
+  /// <inheritdoc cref="IProcessor.Process(IEnumerable)"/>
+  new IEnumerable Process(IEnumerable inputs)
+  {
+    return Process((IEnumerable<TInput>)inputs);
+  }
+}

Process/Process.Interface/IProcessorChain.cs

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+using System.Collections.Generic;
+
+namespace Process.Interface;
+
+/// <summary>
+/// <see cref="IProcessor"/>, allows to process values through many sub-<see cref="IProcessor"/>s
+/// </summary>
+public interface IProcessorChain : IProcessor
+{
+  /// <summary>
+  /// Collection containing the applicable <see cref="IProcessor"/>s for this <see cref="IProcessorChain"/>
+  /// </summary>
+  ICollection<IProcessor> Processors { get; }
+}
+
+/// <inheritdoc cref="IProcessorChain" />
+public interface IProcessorChain<in TInput, out TOutput>
+  : IProcessorChain, IProcessor<TInput, TOutput>
+{
+}

Process/Process.Interface/Process.Interface.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net6.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <GenerateDocumentationFile>True</GenerateDocumentationFile>
+    <IncludeSymbols>True</IncludeSymbols>
+    <GeneratePackageOnBuild>True</GeneratePackageOnBuild>
+  </PropertyGroup>
+
+</Project>

Process/Process.Interface/Readme.md

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+# Ocr.Process
+