diff --git a/src/ncc/Abstracts/RemoteSourceType.php b/src/ncc/Abstracts/RemoteSourceType.php
new file mode 100644
index 0000000..6bfeca6
--- /dev/null
+++ b/src/ncc/Abstracts/RemoteSourceType.php
@@ -0,0 +1,30 @@
+<?php
+
+    namespace ncc\Abstracts;
+
+    abstract class RemoteSourceType
+    {
+        /**
+         * A builtin source type is not defined by the user but handled by
+         * an extension built into NCC
+         */
+        const Builtin = 'builtin';
+
+        /**
+         * A defined source type is defined by the user in the remote sources file
+         * and handled by an extension designed by passing on the information of
+         * the source to the extension
+         */
+        const Defined = 'defined';
+
+        /**
+         * Unsupported or invalid source type
+         */
+        const Unknown = 'unknown';
+
+        const All = [
+            self::Builtin,
+            self::Defined,
+            self::Unknown
+        ];
+    }
\ No newline at end of file