diff --git a/pom.xml b/pom.xml
index 10b6019..a6b5941 100644
--- a/pom.xml
+++ b/pom.xml
@@ -11,6 +11,8 @@
     <description>JSON Schema Parser and Validator</description>
     <url>https://github.com/erosb/json-sKema</url>
 
+    <packaging>jar</packaging>
+
     <scm>
         <connection>https://github.com/erosb/json-sKema</connection>
         <url>https://github.com/erosb/json-sKema</url>
diff --git a/src/main/kotlin/com/github/erosb/jsonsKema/CompositeSchemaBuilder.kt b/src/main/kotlin/com/github/erosb/jsonsKema/CompositeSchemaBuilder.kt
index b590d1c..2fdb72c 100644
--- a/src/main/kotlin/com/github/erosb/jsonsKema/CompositeSchemaBuilder.kt
+++ b/src/main/kotlin/com/github/erosb/jsonsKema/CompositeSchemaBuilder.kt
@@ -66,17 +66,26 @@ abstract class SchemaBuilder {
         @JvmStatic
         fun allOf(subschemas: List<SchemaBuilder>): CompositeSchemaBuilder = empty().allOf(subschemas)
 
+        @JvmStatic
+        fun allOf(vararg subschemas: SchemaBuilder): CompositeSchemaBuilder = empty().allOf(*subschemas)
+
         @JvmStatic
         fun oneOf(subschemas: List<SchemaBuilder>): CompositeSchemaBuilder = empty().oneOf(subschemas)
 
+        @JvmStatic
+        fun oneOf(vararg subschemas: SchemaBuilder): CompositeSchemaBuilder = empty().oneOf(*subschemas)
+
         @JvmStatic
         fun anyOf(subschemas: List<SchemaBuilder>): CompositeSchemaBuilder = empty().anyOf(subschemas)
 
+        @JvmStatic
+        fun anyOf(vararg subschemas: SchemaBuilder): CompositeSchemaBuilder = empty().anyOf(*subschemas)
+
         @JvmStatic
         fun not(notSchema: SchemaBuilder): CompositeSchemaBuilder = empty().not(notSchema)
 
         @JvmStatic
-        fun const(constant: IJsonValue): CompositeSchemaBuilder = empty().const(constant)
+        fun constSchema(constant: IJsonValue): CompositeSchemaBuilder = empty().constSchema(constant)
 
         @JvmStatic
         fun enumSchema(vararg enumValues: IJsonValue) = enumSchema(enumValues.toList())
@@ -299,22 +308,28 @@ class CompositeSchemaBuilder internal constructor() : SchemaBuilder() {
             AllOfSchema(subschemas.map { it.buildAt(loc) }, loc)
         }
 
+    fun allOf(vararg subschemas: SchemaBuilder) = allOf(subschemas.toList())
+
     fun oneOf(subschemas: List<SchemaBuilder>) =
         appendSupplier(Keyword.ONE_OF) { loc ->
             OneOfSchema(subschemas.map { it.buildAt(loc) }, loc)
         }
 
+    fun oneOf(vararg subschemas: SchemaBuilder) = oneOf(subschemas.toList())
+
     fun anyOf(subschemas: List<SchemaBuilder>) =
         appendSupplier(Keyword.ANY_OF) { loc ->
             AnyOfSchema(subschemas.map { it.buildAt(loc) }, loc)
         }
 
+    fun anyOf(vararg subschemas: SchemaBuilder) = anyOf(subschemas.toList())
+
     fun not(negatedSchema: SchemaBuilder) =
         appendSupplier(Keyword.NOT) { loc ->
             NotSchema(negatedSchema.buildAt(loc), loc)
         }
 
-    fun const(constant: IJsonValue) =
+    fun constSchema(constant: IJsonValue) =
         appendSupplier(Keyword.CONST) { loc ->
             ConstSchema(constant, loc)
         }
diff --git a/src/main/kotlin/com/github/erosb/jsonsKema/JsonValue.kt b/src/main/kotlin/com/github/erosb/jsonsKema/JsonValue.kt
index f4d1433..ba0acce 100644
--- a/src/main/kotlin/com/github/erosb/jsonsKema/JsonValue.kt
+++ b/src/main/kotlin/com/github/erosb/jsonsKema/JsonValue.kt
@@ -221,12 +221,12 @@ abstract class JsonValue(override val location: SourceLocation = UnknownSource)
     final override fun toString(): String = accept(JsonPrintingVisitor())!!
 }
 
-data class JsonNull(override val location: SourceLocation = UnknownSource) : IJsonNull, JsonValue(location) {
+data class JsonNull @JvmOverloads constructor(override val location: SourceLocation = UnknownSource) : IJsonNull, JsonValue(location) {
     override fun unwrap(): Any? = null
     override fun equals(other: Any?) = super.equals(other)
 }
 
-data class JsonBoolean(
+data class JsonBoolean @JvmOverloads constructor(
     override val value: Boolean,
     override val location: SourceLocation = UnknownSource
 ) : JsonValue(location), IJsonBoolean {
@@ -234,7 +234,7 @@ data class JsonBoolean(
     override fun equals(other: Any?) = super.equals(other)
 }
 
-data class JsonNumber(
+data class JsonNumber @JvmOverloads constructor(
     override val value: Number,
     override val location: SourceLocation = UnknownSource
 ) : JsonValue(location), IJsonNumber {
@@ -247,15 +247,17 @@ data class JsonNumber(
     }
 }
 
-data class JsonString(override val value: String, override val location: SourceLocation = UnknownSource) :
-    JsonValue(location), IJsonString {
+data class JsonString @JvmOverloads constructor(
+    override val value: String,
+    override val location: SourceLocation = UnknownSource
+) : JsonValue(location), IJsonString {
 
     override fun equals(other: Any?) = super.equals(other)
 
     override fun unwrap() = value
 }
 
-data class JsonArray(
+data class JsonArray @JvmOverloads constructor(
     override val elements: List<JsonValue>,
     override val location: SourceLocation = UnknownSource
 ) : JsonValue(location), IJsonArray<JsonValue> {
@@ -267,7 +269,7 @@ data class JsonArray(
     override fun equals(other: Any?) = super.equals(other)
 }
 
-data class JsonObject(
+data class JsonObject @JvmOverloads constructor(
     override val properties: Map<JsonString, JsonValue>,
     override val location: SourceLocation = UnknownSource
 ) : JsonValue(location), IJsonObject<JsonString, JsonValue> {
diff --git a/src/test/kotlin/com/github/erosb/jsonsKema_fluent/SchemaBuilderTest.kt b/src/test/kotlin/com/github/erosb/jsonsKema_fluent/SchemaBuilderTest.kt
index aacbfb3..c9af4b4 100644
--- a/src/test/kotlin/com/github/erosb/jsonsKema_fluent/SchemaBuilderTest.kt
+++ b/src/test/kotlin/com/github/erosb/jsonsKema_fluent/SchemaBuilderTest.kt
@@ -336,7 +336,7 @@ class SchemaBuilderTest {
     fun not() {
         val schema = SchemaBuilder.not(SchemaBuilder.typeObject()
             .property("propA", SchemaBuilder.typeNumber().not(
-                SchemaBuilder.const(JsonNumber(2))
+                SchemaBuilder.constSchema(JsonNumber(2))
             ))
         ).build()