diff --git a/Sources/SwiftNLP/1. Data Collection/DurableHNSWCorpus + Dictionary.swift b/Sources/SwiftNLP/1. Data Collection/DurableHNSWCorpus + Dictionary.swift
index d73152be76f5c2fcc878fa02d21de6b3a2a361bf..0f7bcd056fb74e886cc2b5735ff22e7a54504a9e 100644
--- a/Sources/SwiftNLP/1. Data Collection/DurableHNSWCorpus + Dictionary.swift	
+++ b/Sources/SwiftNLP/1. Data Collection/DurableHNSWCorpus + Dictionary.swift	
@@ -1,8 +1,27 @@
+// Copyright (c) 2024 Jim Wallace
 //
-//  HNSWCorpus + Dictionary.swift
+// Permission is hereby granted, free of charge, to any person
+// obtaining a copy of this software and associated documentation
+// files (the "Software"), to deal in the Software without
+// restriction, including without limitation the rights to use,
+// copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the
+// Software is furnished to do so, subject to the following
+// conditions:
 //
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
 //
-//  Created by Mingchung Xia on 2024-02-26.
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+// OTHER DEALINGS IN THE SOFTWARE.
+//
+// Created by Mingchung Xia on 2024-02-26.
 //
 
 import Foundation
diff --git a/Sources/SwiftNLP/1. Data Collection/DurableHNSWCorpus + File IO.swift b/Sources/SwiftNLP/1. Data Collection/DurableHNSWCorpus + File IO.swift
index 950ceaccbdc3e3471929c0d02f8b1d292396de05..c5ee27c982f56dd827e96241f5d0c8b2e499ba7d 100644
--- a/Sources/SwiftNLP/1. Data Collection/DurableHNSWCorpus + File IO.swift	
+++ b/Sources/SwiftNLP/1. Data Collection/DurableHNSWCorpus + File IO.swift	
@@ -1,8 +1,27 @@
+// Copyright (c) 2024 Jim Wallace
 //
-//  DurableHNSWCorpus + File IO.swift
+// Permission is hereby granted, free of charge, to any person
+// obtaining a copy of this software and associated documentation
+// files (the "Software"), to deal in the Software without
+// restriction, including without limitation the rights to use,
+// copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the
+// Software is furnished to do so, subject to the following
+// conditions:
 //
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
 //
-//  Created by Mingchung Xia on 2024-03-12.
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+// OTHER DEALINGS IN THE SOFTWARE.
+//
+// Created by Mingchung Xia on 2024-03-12.
 //
 
 import Foundation
diff --git a/Sources/SwiftNLP/1. Data Collection/DurableHNSWCorpus + Sequence.swift b/Sources/SwiftNLP/1. Data Collection/DurableHNSWCorpus + Sequence.swift
index e65ffe52a37b589369934844dc30922d3c363f98..bbef525b0cd66b655da15757826f76a719239e41 100644
--- a/Sources/SwiftNLP/1. Data Collection/DurableHNSWCorpus + Sequence.swift	
+++ b/Sources/SwiftNLP/1. Data Collection/DurableHNSWCorpus + Sequence.swift	
@@ -1,8 +1,27 @@
+// Copyright (c) 2024 Jim Wallace
 //
-//  DurableHNSWCorpus + Sequence.swift
-//  
+// Permission is hereby granted, free of charge, to any person
+// obtaining a copy of this software and associated documentation
+// files (the "Software"), to deal in the Software without
+// restriction, including without limitation the rights to use,
+// copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the
+// Software is furnished to do so, subject to the following
+// conditions:
 //
-//  Created by Mingchung Xia on 2024-03-16.
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+// OTHER DEALINGS IN THE SOFTWARE.
+//
+// Created by Mingchung Xia on 2024-03-16.
 //
 
 import Foundation
diff --git a/Sources/SwiftNLP/1. Data Collection/DurableHNSWCorpus.swift b/Sources/SwiftNLP/1. Data Collection/DurableHNSWCorpus.swift
index 3aa1e8a8c0a954b6d0776dfd6a15898866d40045..9b35a02a34f947b96071a316aea01d06160bb21f 100644
--- a/Sources/SwiftNLP/1. Data Collection/DurableHNSWCorpus.swift	
+++ b/Sources/SwiftNLP/1. Data Collection/DurableHNSWCorpus.swift	
@@ -1,8 +1,27 @@
+// Copyright (c) 2024 Jim Wallace
 //
-//  DurableHNSWCorpus.swift
+// Permission is hereby granted, free of charge, to any person
+// obtaining a copy of this software and associated documentation
+// files (the "Software"), to deal in the Software without
+// restriction, including without limitation the rights to use,
+// copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the
+// Software is furnished to do so, subject to the following
+// conditions:
 //
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
 //
-//  Created by Mingchung Xia on 2024-02-26.
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+// OTHER DEALINGS IN THE SOFTWARE.
+//
+// Created by Mingchung Xia on 2024-02-26.
 //
 
 import Foundation
diff --git a/Sources/SwiftNLP/1. Data Collection/EphemeralHNSWCorpus + Codable.swift b/Sources/SwiftNLP/1. Data Collection/EphemeralHNSWCorpus + Codable.swift
index b5bc0eea3206d4b4c80d89bcd5c36244bf661c21..a4a9b3c04e62578d4bdf4f52d609a82a011ea042 100644
--- a/Sources/SwiftNLP/1. Data Collection/EphemeralHNSWCorpus + Codable.swift	
+++ b/Sources/SwiftNLP/1. Data Collection/EphemeralHNSWCorpus + Codable.swift	
@@ -1,8 +1,27 @@
+// Copyright (c) 2024 Jim Wallace
 //
-//  HNSWCorpus + Codable.swift
+// Permission is hereby granted, free of charge, to any person
+// obtaining a copy of this software and associated documentation
+// files (the "Software"), to deal in the Software without
+// restriction, including without limitation the rights to use,
+// copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the
+// Software is furnished to do so, subject to the following
+// conditions:
 //
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
 //
-//  Created by Mingchung Xia on 2024-02-07.
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+// OTHER DEALINGS IN THE SOFTWARE.
+//
+// Created by Mingchung Xia on 2024-02-07.
 //
 
 import Foundation
diff --git a/Sources/SwiftNLP/1. Data Collection/EphemeralHNSWCorpus + Dictionary.swift b/Sources/SwiftNLP/1. Data Collection/EphemeralHNSWCorpus + Dictionary.swift
index 489b4467d765fdbe46522b44d19bbdef25928d1d..1dd1e8a4a6b1fc8caa7c8ba93ad8aa3dd0c19650 100644
--- a/Sources/SwiftNLP/1. Data Collection/EphemeralHNSWCorpus + Dictionary.swift	
+++ b/Sources/SwiftNLP/1. Data Collection/EphemeralHNSWCorpus + Dictionary.swift	
@@ -1,8 +1,27 @@
+// Copyright (c) 2024 Jim Wallace
 //
-//  HNSWCorpus + Dictionary.swift
+// Permission is hereby granted, free of charge, to any person
+// obtaining a copy of this software and associated documentation
+// files (the "Software"), to deal in the Software without
+// restriction, including without limitation the rights to use,
+// copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the
+// Software is furnished to do so, subject to the following
+// conditions:
 //
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
 //
-//  Created by Mingchung Xia on 2024-02-14.
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+// OTHER DEALINGS IN THE SOFTWARE.
+//
+// Created by Mingchung Xia on 2024-02-14.
 //
 
 import Foundation
diff --git a/Sources/SwiftNLP/1. Data Collection/EphemeralHNSWCorpus + Sequence.swift b/Sources/SwiftNLP/1. Data Collection/EphemeralHNSWCorpus + Sequence.swift
index 0f3f4c68ee92c13805da3f5458adaca3e2c9eb98..e9670f71b295d37f8a5ba264b528caf80a3959d3 100644
--- a/Sources/SwiftNLP/1. Data Collection/EphemeralHNSWCorpus + Sequence.swift	
+++ b/Sources/SwiftNLP/1. Data Collection/EphemeralHNSWCorpus + Sequence.swift	
@@ -20,6 +20,9 @@
 // WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 // OTHER DEALINGS IN THE SOFTWARE.
+//
+// Created by Mingchung Xia on 2024-02-14.
+//
 
 import Foundation
 
diff --git a/Sources/SwiftNLP/1. Data Collection/EphemeralHNSWCorpus.swift b/Sources/SwiftNLP/1. Data Collection/EphemeralHNSWCorpus.swift
index dbcde20d67c1d5e2e083b136064b76f59af18186..9982903291a49649bee88abff50001a31b8c9799 100644
--- a/Sources/SwiftNLP/1. Data Collection/EphemeralHNSWCorpus.swift	
+++ b/Sources/SwiftNLP/1. Data Collection/EphemeralHNSWCorpus.swift	
@@ -20,6 +20,9 @@
 // WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 // OTHER DEALINGS IN THE SOFTWARE.
+//
+// Created by Mingchung Xia on 2024-02-14.
+//
 
 import Foundation
 
diff --git a/Sources/SwiftNLP/1. Data Collection/HNSW/CartesianDistanceMetric.swift b/Sources/SwiftNLP/1. Data Collection/HNSW/CartesianDistanceMetric.swift
index 70678a58c8ec8a9981571deee4def309de9717ff..c2fb0d99f4887a4e9412abdc86597726351c9d6f 100644
--- a/Sources/SwiftNLP/1. Data Collection/HNSW/CartesianDistanceMetric.swift	
+++ b/Sources/SwiftNLP/1. Data Collection/HNSW/CartesianDistanceMetric.swift	
@@ -28,9 +28,8 @@ import Foundation
 import SimilarityMetric
 
 #if canImport(Surge) && canImport(Accelerate) && os(macOS)
-
-import Accelerate
 import Surge
+import Accelerate
 
 public struct CartesianDistanceMetric<Vector: Collection & Codable>: SimilarityMetric where Vector.Element: BinaryFloatingPoint {
     public func similarity(between someItem: Vector, _ otherItem: Vector) -> Vector.Element {
@@ -39,9 +38,10 @@ public struct CartesianDistanceMetric<Vector: Collection & Codable>: SimilarityM
 }
 
 #else
+// TODO: Import using Nifty (currently unable to fetch package dependency)
+// import Nifty
 
-// This may be less efficient on Linux
-
+/// This implementation may be less efficient on Linux
 public struct CartesianDistanceMetric<Vector: Collection & Codable>: SimilarityMetric where Vector.Element: BinaryFloatingPoint {
     public func similarity(between someItem: Vector, _ otherItem: Vector) -> Vector.Element {
         return someItem.enumerated().reduce(0) { result, item in
diff --git a/Sources/SwiftNLP/1. Data Collection/HNSW/CosineSimilarityMetric.swift b/Sources/SwiftNLP/1. Data Collection/HNSW/CosineSimilarityMetric.swift
index 66b2f389593e0503d41a4aa4c988f0d3a4c17bdd..65d0384d58924f3f61658b29a2dd2abd17b4f073 100644
--- a/Sources/SwiftNLP/1. Data Collection/HNSW/CosineSimilarityMetric.swift	
+++ b/Sources/SwiftNLP/1. Data Collection/HNSW/CosineSimilarityMetric.swift	
@@ -1,19 +1,35 @@
+// Copyright (c) 2024 Jim Wallace
 //
-//  CosineSimilarityMetric.swift
+// Permission is hereby granted, free of charge, to any person
+// obtaining a copy of this software and associated documentation
+// files (the "Software"), to deal in the Software without
+// restriction, including without limitation the rights to use,
+// copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the
+// Software is furnished to do so, subject to the following
+// conditions:
 //
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
 //
-//  Created by Mingchung Xia on 2024-03-14.
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+// OTHER DEALINGS IN THE SOFTWARE.
+//
+// Created by Mingchung Xia on 2024-03-14.
 //
-
-#if canImport(Surge) && canImport(Accelerate) && os(macOS)
 
 import Foundation
-import Accelerate
 import SimilarityMetric
-import Surge
 
-// MARK: May be improved on using Surge/Nifty
-// See https://developer.apple.com/documentation/accelerate/vdsp-snv
+#if canImport(Surge) && canImport(Accelerate) && os(macOS)
+import Surge
+import Accelerate
 
 public struct CosineSimilarityMetric<Vector: Collection & Codable>: SimilarityMetric where Vector.Element: BinaryFloatingPoint {
     public func similarity(between someItem: Vector, _ otherItem: Vector) -> Vector.Element {
@@ -37,9 +53,10 @@ public struct CosineSimilarityMetric<Vector: Collection & Codable>: SimilarityMe
 }
 
 #else
+// TODO: Import using Nifty (currently unable to fetch package dependency)
+// import Nifty
 
-// This may be less efficient on Linux
-
+/// This implementation may be less efficient on Linux
 public struct CosineSimilarityMetric<Vector: Collection & Codable>: SimilarityMetric where Vector.Element: BinaryFloatingPoint {
     public func similarity(between someItem: Vector, _ otherItem: Vector) -> Vector.Element {
         let dotProduct = zip(someItem, otherItem).reduce(0) { $0 + $1.0 * $1.1 }
diff --git a/Sources/SwiftNLP/1. Data Collection/HNSW/DeterministicEphemeralVectorIndex + Codable.swift b/Sources/SwiftNLP/1. Data Collection/HNSW/DeterministicEphemeralVectorIndex + Codable.swift
index cd5b319cab551c331b5064599553b25419d44081..8445929834592a51a2779a3cc89a31ef6ddca2a1 100644
--- a/Sources/SwiftNLP/1. Data Collection/HNSW/DeterministicEphemeralVectorIndex + Codable.swift	
+++ b/Sources/SwiftNLP/1. Data Collection/HNSW/DeterministicEphemeralVectorIndex + Codable.swift	
@@ -1,8 +1,27 @@
+// Copyright (c) 2024 Jim Wallace
 //
-//  DeterministicEphemeralVectorIndex + Codable.swift
+// Permission is hereby granted, free of charge, to any person
+// obtaining a copy of this software and associated documentation
+// files (the "Software"), to deal in the Software without
+// restriction, including without limitation the rights to use,
+// copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the
+// Software is furnished to do so, subject to the following
+// conditions:
 //
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
 //
-//  Created by Mingchung Xia on 2024-02-07.
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+// OTHER DEALINGS IN THE SOFTWARE.
+//
+// Created by Mingchung Xia on 2024-02-07.
 //
 
 import Foundation
diff --git a/Sources/SwiftNLP/1. Data Collection/HNSW/HNSWCorpusDataHandler.swift b/Sources/SwiftNLP/1. Data Collection/HNSW/HNSWCorpusDataHandler.swift
index a6af8574d1cfeae396d260a8cfca0e3efb919c18..915e254a7bbf5213f0c1afe207efcea1a14ec546 100644
--- a/Sources/SwiftNLP/1. Data Collection/HNSW/HNSWCorpusDataHandler.swift	
+++ b/Sources/SwiftNLP/1. Data Collection/HNSW/HNSWCorpusDataHandler.swift	
@@ -1,11 +1,30 @@
+// Copyright (c) 2024 Jim Wallace
 //
-//  HNSWCorpusDataHandler.swift
+// Permission is hereby granted, free of charge, to any person
+// obtaining a copy of this software and associated documentation
+// files (the "Software"), to deal in the Software without
+// restriction, including without limitation the rights to use,
+// copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the
+// Software is furnished to do so, subject to the following
+// conditions:
 //
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
 //
-//  Created by Mingchung Xia on 2024-02-13.
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+// OTHER DEALINGS IN THE SOFTWARE.
+//
+// Created by Mingchung Xia on 2024-02-13.
 //
 
-// This is outdated since we now have the presence of a DurableHNSWCorpus but still available for reference
+// MARK: This is outdated since we now have the presence of a DurableHNSWCorpus but still available for reference
 
 import Foundation