diff --git a/ksc-java/builtin.ksy b/ksc-java/builtin.ksy
new file mode 100644
index 0000000..5ffcd7d
--- /dev/null
+++ b/ksc-java/builtin.ksy
@@ -0,0 +1,314 @@
+meta:
+  id: builtin
+  endian: be
+  encoding: utf-8
+seq:
+  - id: bytes
+    size: unknown
+  - id: unsigned
+    type: unsigned
+    size: 20
+  - id: signed
+    type: signed
+instances:
+  parse:
+    pos: 10
+    type: str
+    terminator: 0x10
+  value:
+    value: unsigned
+  type:
+    type: signed
+types:
+  unsigned:
+    meta:
+      endian:
+        switch-on: 1 == 2
+        cases:
+          true: be
+          _: le
+    seq:
+      - id: u1
+        type: u1
+
+      - id: u2
+        type: u2
+      - id: u2be
+        type: u2be
+      - id: u2le
+        type: u2le
+
+      - id: u4
+        type: u4
+      - id: u4be
+        type: u4be
+      - id: u4le
+        type: u4le
+
+      - id: u8
+        type: u8
+      - id: u8be
+        type: u8be
+      - id: u8le
+        type: u8le
+  signed:
+    seq:
+      - id: s1
+        type: s1
+
+      - id: s2
+        type: s2
+      - id: s2be
+        type: s2be
+      - id: s2le
+        type: s2le
+
+      - id: s4
+        type: s4
+      - id: s4be
+        type: s4be
+      - id: s4le
+        type: s4le
+
+      - id: s8
+        type: s8
+      - id: s8be
+        type: s8be
+      - id: s8le
+        type: s8le
+  switch:
+    seq:
+      - id: a
+        type: u1
+      - id: b
+        type: u1
+      - id: c
+        type: u1
+      - id: switch
+        type:
+          switch-on: 4 - 2
+          cases:
+            0: u1
+            1: u2be
+            2: u4be
+            _: u8be
+      - id: if
+        type:
+          switch-on: 4 - 2
+          cases:
+            a: u1
+            b: u2be
+            c: u4be
+            _: u8be
+  quantity:
+    seq:
+      - id: field
+        type: u1
+      - type: u1
+      - id: condition
+        type: u1
+        if: true
+      - id: repeat_eos
+        type: u1
+        repeat: eos
+      - id: repeat_expr
+        type: u1
+        repeat: expr
+        repeat-expr: 2
+      - id: repeat_until
+        type: u1
+        repeat: until
+        repeat-until: false
+      - id: condition_array
+        type: u1
+        repeat: expr
+        repeat-expr: 2
+        if: true
+  size:
+    seq:
+      - id: size
+        type: switch
+        size: 10
+      - id: eos
+        type: switch
+        size-eos: true
+      - id: terminator
+        type: switch
+        terminator: 0xFF
+      - id: size_terminator
+        type: switch
+        size: 10
+        terminator: 0
+      - id: eos_terminator
+        type: switch
+        size-eos: true
+        terminator: 0
+  types:
+    seq:
+      - id: f4
+        type: f4
+      - id: f4be
+        type: f4be
+      - id: f4le
+        type: f4le
+      - id: f8
+        type: f8
+      - id: f8be
+        type: f8be
+      - id: f8le
+        type: f8le
+      - id: str
+        type: str
+        size-eos: true
+      - id: strz
+        type: strz
+      - id: bytes
+        size-eos: true
+      - id: bytes_terminator
+        terminator: 0
+      - id: bytes_eos_terminator
+        size-eos: true
+        terminator: 0
+  enums:
+    seq:
+      - id: enum
+        type: u1
+        enum: enum
+  # Для тестов разрешения коллизии имен
+  names:
+    seq:
+      - size: 1
+      - size: 1
+      - id: unnamed0
+        size: 1
+      - id: unnamed01
+        size: 1
+      - id: unnamed0_1
+        size: 1
+      - id: enum
+        size: 1
+      - id: enum1
+        size: 1
+      - id: enum1_1
+        size: 1
+  int_properties:
+    seq:
+      - id: u1_number
+        type: u1
+      - id: u2_number
+        type: u2
+      - id: u4_number
+        type: u4
+      - id: u8_number
+        type: u8
+
+      - id: s1_number
+        type: s1
+      - id: s2_number
+        type: s2
+      - id: s4_number
+        type: s4
+      - id: s8_number
+        type: s8
+    instances:
+      u1_to_s:
+        value: u1_number.to_s
+      u2_to_s:
+        value: u2_number.to_s
+      u4_to_s:
+        value: u4_number.to_s
+      u8_to_s:
+        value: u8_number.to_s
+
+      s1_to_s:
+        value: s1_number.to_s
+      s2_to_s:
+        value: s2_number.to_s
+      s4_to_s:
+        value: s4_number.to_s
+      s8_to_s:
+        value: s8_number.to_s
+  float_properties:
+    seq:
+      - id: f4_number
+        type: f4
+      - id: f8_number
+        type: f8
+    instances:
+      f4_to_i:
+        value: f4_number.to_i
+      f8_to_i:
+        value: f8_number.to_i
+  array_properties:
+    seq:
+      - id: array
+        size: 20
+    instances:
+      to_s:
+        value: array.to_s("utf-8")
+      length:
+        value: array.length
+      first:
+        value: array.first
+      last:
+        value: array.last
+      size:
+        value: array.size
+      min:
+        value: array.min
+      max:
+        value: array.max
+  string_properties:
+    seq:
+      - id: string
+        type: strz
+    instances:
+      length:
+        value: string.length
+      reverse:
+        value: string.reverse
+      substring:
+        value: string.substring(0, 2)
+      to_i:
+        value: string.to_i
+      to_i_16:
+        value: string.to_i(16)
+  bool_properties:
+    seq:
+      - id: bool
+        type: b1
+    instances:
+      to_i:
+        value: bool.to_i
+  enum_properties:
+    seq:
+      - id: enum
+        type: u1
+        enum: enum
+    instances:
+      to_i:
+        value: enum.to_i
+  stream_properties:
+    instances:
+      eof:
+        value: _io.eof
+      size:
+        value: _io.size
+      pos:
+        value: _io.pos
+  user_type_properties:
+    seq:
+      - id: user_type
+        type: size
+    instances:
+      root:
+        value: user_type._root
+      # parent: # Ошибка: Unable to derive _parent type in builtin::size
+      #   value: user_type._parent
+      io:
+        value: user_type._io
+
+enums:
+  enum:
+    0: e0
+    1: e1
diff --git a/ksc.bat b/ksc.bat
new file mode 100644
index 0000000..bd8b8d3
--- /dev/null
+++ b/ksc.bat
@@ -0,0 +1,4 @@
+@echo off
+
+cd ./ksc-java
+./kaitai-struct-compiler-0.9/bin/kaitai-struct-compiler.bat --target java builtin.ksy
\ No newline at end of file