diff --git a/Sources/Yams/Constructor.swift b/Sources/Yams/Constructor.swift
index 4120202c..41633d69 100644
--- a/Sources/Yams/Constructor.swift
+++ b/Sources/Yams/Constructor.swift
@@ -98,6 +98,19 @@ extension Constructor {
         .omap: [Any].construct_omap,
         .pairs: [Any].construct_pairs
     ]
+
+    ///`Tag.Name` to `Node.Mapping` map that support dynamic collection.
+    public static let dynamicMappingMap: MappingMap = [
+        .map: NSMutableDictionary.construct_mapping,
+        .set: NSMutableSet.construct_set
+    ]
+
+    ///`Tag.Name` to `Node.Sequence` map that support dynamic collection.
+    public static let dynamicSequenceMap: SequenceMap = [
+        .seq: NSMutableArray.construct_seq,
+        .omap: NSMutableArray.construct_omap,
+        .pairs: NSMutableArray.construct_pairs
+    ]
 }
 
 // MARK: - ScalarConstructible
@@ -252,12 +265,12 @@ extension ScalarConstructible where Self: FloatingPoint & SexagesimalConvertible
             return nil
         }
 
-        switch scalar.string {
-        case ".inf", ".Inf", ".INF", "+.inf", "+.Inf", "+.INF":
+      switch scalar.string.lowercased() {
+        case ".inf", "+.inf":
             return .infinity
-        case "-.inf", "-.Inf", "-.INF":
+        case "-.inf":
             return -.infinity
-        case ".nan", ".NaN", ".NAN":
+        case ".nan":
             return .nan
         default:
             let string = scalar.string.replacingOccurrences(of: "_", with: "")
@@ -433,6 +446,31 @@ private extension Dictionary {
     }
 }
 
+extension NSMutableDictionary {
+    /// Construct an `NSMutableDictionary`, if possible, from the specified mapping.
+    ///
+    /// - parameter mapping: The `Node.Mapping` from which to extract an `NSMutableDictionary`, if possible.
+    ///
+    /// - returns: An instance of `NSMutableDictionary`, if one was successfully extracted from the mapping.
+    public static func construct_mapping(from mapping: Node.Mapping) -> NSMutableDictionary? {
+        _construct_mapping(from: mapping)
+    }
+}
+
+private extension NSMutableDictionary {
+    static func _construct_mapping(from mapping: Node.Mapping) -> NSMutableDictionary {
+        let result = NSMutableDictionary()
+        let mapping = mapping.flatten()
+
+        mapping.forEach { key, value in
+            if let keyString = String.construct(from: key) {
+                result[keyString] = mapping.tag.constructor.any(from: value)
+            }
+        }
+        return result
+    }
+}
+
 extension Set {
     /// Construct a `Set`, if possible, from the specified mapping.
     ///
@@ -447,6 +485,23 @@ extension Set {
     }
 }
 
+extension NSMutableSet {
+    /// Construct an `NSMutableSet`, if possible, from the specified mapping.
+    ///
+    /// - parameter mapping: The `Node.Mapping` from which to extract an `NSMutableSet`, if possible.
+    ///
+    /// - returns: An instance of `NSMutableSet`, if one was successfully extracted from the mapping.
+    public static func construct_set(from mapping: Node.Mapping) -> NSMutableSet? {
+        let result = NSMutableSet()
+        mapping.forEach { key, _ in
+            if let keyString = String.construct(from: key) {
+                result.add(keyString as AnyHashable)
+            }
+        }
+        return result
+    }
+}
+
 // MARK: Sequence
 
 extension Array {
@@ -488,6 +543,52 @@ extension Array {
     }
 }
 
+extension NSMutableArray {
+    /// Construct an NSMutableArray of `Any` from the specified `sequence`.
+    ///
+    /// - parameter sequence: Sequence to convert to `NSMutableArray`.
+    ///
+    /// - returns: NSMutableArray of `Any`.
+    public static func construct_seq(from sequence: Node.Sequence) -> NSMutableArray {
+        let result = NSMutableArray()
+        sequence.forEach { subnode in
+            result.add(sequence.tag.constructor.any(from: subnode))
+        }
+        return result
+    }
+
+    /// Construct an "O-map" (NSMutableArray of `(Any, Any)` tuples) from the specified `sequence`.
+    ///
+    /// - parameter sequence: Sequence to convert to `NSMutableArray`.
+    ///
+    /// - returns: NSMutableArray of `(Any, Any)` tuples.
+    public static func construct_omap(from sequence: Node.Sequence) -> NSMutableArray {
+        let result = NSMutableArray()
+        sequence.forEach { subnode in
+            // TODO: Should raise error if subnode is not mapping or mapping.count != 1
+            if let (key, value) = subnode.mapping?.first {
+                result.add((sequence.tag.constructor.any(from: key), sequence.tag.constructor.any(from: value)))
+            }
+        }
+        return result
+    }
+
+    /// Construct an NSMutableArray of `(Any, Any)` tuples from the specified `sequence`.
+    ///
+    /// - parameter sequence: Sequence to convert to `NSMutableArray`.
+    ///
+    /// - returns: NSMutableArray of `(Any, Any)` tuples.
+    public static func construct_pairs(from sequence: Node.Sequence) -> NSMutableArray {
+        let result = NSMutableArray()
+        sequence.forEach { subnode in
+            if let (key, value) = subnode.mapping?.first {
+                result.add((sequence.tag.constructor.any(from: key), sequence.tag.constructor.any(from: value)))
+            }
+        }
+        return result
+    }
+}
+
 private extension String {
     func substring(with range: NSRange) -> Substring? {
         guard range.location != NSNotFound else { return nil }
diff --git a/Sources/Yams/Representer.swift b/Sources/Yams/Representer.swift
index 70310ff8..41e7296d 100644
--- a/Sources/Yams/Representer.swift
+++ b/Sources/Yams/Representer.swift
@@ -57,6 +57,14 @@ extension Array: NodeRepresentable {
     }
 }
 
+extension NSArray: NodeRepresentable {
+    /// This value's `Node` representation.
+    public func represented() throws -> Node {
+        let nodes = try map(represent)
+        return Node(nodes, Tag(.seq))
+    }
+}
+
 extension Dictionary: NodeRepresentable {
     /// This value's `Node` representation.
     public func represented() throws -> Node {
@@ -65,6 +73,14 @@ extension Dictionary: NodeRepresentable {
     }
 }
 
+extension NSDictionary: NodeRepresentable {
+    /// This value's `Node` representation.
+    public func represented() throws -> Node {
+        let pairs = try map { (key: try represent($0.0), value: try represent($0.1)) }
+        return Node(pairs.sorted { $0.key < $1.key }, Tag(.map))
+    }
+}
+
 private func represent(_ value: Any) throws -> Node {
     if let representable = value as? NodeRepresentable {
         return try representable.represented()
@@ -187,6 +203,13 @@ extension Float: ScalarRepresentable {
     }
 }
 
+extension NSValue: ScalarRepresentable {
+    /// This value's `Node.scalar` representation.
+    public func represented() -> Node.Scalar {
+        return .init(floatFormatter.string(for: self)!.replacingOccurrences(of: "+-", with: "-"), Tag(.float))
+    }
+}
+
 private func numberFormatter(with significantDigits: Int) -> NumberFormatter {
     let formatter = NumberFormatter()
     formatter.locale = Locale(identifier: "en_US")
@@ -258,6 +281,14 @@ extension String: ScalarRepresentable {
     }
 }
 
+extension NSString: ScalarRepresentable {
+    /// This value's `Node.scalar` representation.
+    public func represented() -> Node.Scalar {
+      let scalar = Node.Scalar(String(self))
+        return scalar.resolvedTag.name == .str ? scalar : .init(String(self), Tag(.str), .singleQuoted)
+    }
+}
+
 extension UUID: ScalarRepresentable {
     /// This value's `Node.scalar` representation.
     public func represented() -> Node.Scalar {