diff --git a/.gitignore b/.gitignore
index 6b5d676261f0d0f67d4d5cf50ba2c7b199169d70..a8b35e032981d5a175a7316a625a5042ebd738f0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1207,4 +1207,5 @@ fabric.properties
 /docs/source/**/*.sh.txt
 /docs/source/**/*.sh.err
 /docs/source/**/*.sh.exitcode
-/docs/source/**/*.dat.*
\ No newline at end of file
+/docs/source/**/*.dat.*
+/docs/source/**/*.auto.rst
\ No newline at end of file
diff --git a/docs/Makefile b/docs/Makefile
index 2509949ddf8d5bf204c22ec9367e84286f3cd6ad..98468a0c063a02785e455568b679435719693262 100644
--- a/docs/Makefile
+++ b/docs/Makefile
@@ -13,6 +13,8 @@ GRAPHVIZ_MK := ${SOURCEDIR}/graphviz.mk
 GRAPHVIZ    := $(MAKE) -f "${GRAPHVIZ_MK}" SOURCE=${SOURCEDIR}
 DEMOS_MK    := ${SOURCEDIR}/demos.mk
 DEMOS       := $(MAKE) -f "${DEMOS_MK}" SOURCE=${SOURCEDIR}
+APIDOC_MK   := ${SOURCEDIR}/apidoc.mk
+APIDOC      := $(MAKE) -f "${APIDOC_MK}" SOURCE=${SOURCEDIR}
 
 _CURRENT_PATH := ${PATH}
 _PROJ_DIR     := $(shell readlink -f ${CURDIR}/..)
@@ -34,6 +36,7 @@ help:
 	@$(SPHINXBUILD) -M help "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
 
 contents:
+	@$(APIDOC) build
 	@$(DIAGRAMS) build
 	@$(GRAPHVIZ) build
 	@$(DEMOS) build
@@ -50,6 +53,7 @@ clean:
 	@$(DIAGRAMS) clean
 	@$(GRAPHVIZ) clean
 	@$(DEMOS) clean
+	@$(APIDOC) clean
 	@$(SPHINXBUILD) -M clean "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
 
 sourcedir:
diff --git a/docs/source/api_doc/common/index.rst b/docs/source/api_doc/common/index.rst
new file mode 100644
index 0000000000000000000000000000000000000000..da2c8b032385b0f23d2637e8d05d01533e08eaa3
--- /dev/null
+++ b/docs/source/api_doc/common/index.rst
@@ -0,0 +1,8 @@
+treetensor.common
+=====================
+
+.. toctree::
+    :maxdepth: 3
+
+    trees.auto
+    wrappers.auto
diff --git a/docs/source/api_doc/common/trees.rstc b/docs/source/api_doc/common/trees.rstc
new file mode 100644
index 0000000000000000000000000000000000000000..f3dabcbbb3d35eb2c791f2c3735a1dbb01e6d4f2
--- /dev/null
+++ b/docs/source/api_doc/common/trees.rstc
@@ -0,0 +1 @@
+treetensor.common.trees
\ No newline at end of file
diff --git a/docs/source/api_doc/common/wrappers.rstc b/docs/source/api_doc/common/wrappers.rstc
new file mode 100644
index 0000000000000000000000000000000000000000..bc2b3555564dde4e12dcb76194ed4e67ecb30e72
--- /dev/null
+++ b/docs/source/api_doc/common/wrappers.rstc
@@ -0,0 +1 @@
+treetensor.common.wrappers
\ No newline at end of file
diff --git a/docs/source/api_doc/tensor/funcs.rstc b/docs/source/api_doc/tensor/funcs.rstc
new file mode 100644
index 0000000000000000000000000000000000000000..8cf5eaefc59333b720c8eb29a1cec3fc901d61fc
--- /dev/null
+++ b/docs/source/api_doc/tensor/funcs.rstc
@@ -0,0 +1 @@
+treetensor.tensor.funcs
\ No newline at end of file
diff --git a/docs/source/api_doc/tensor/index.rst b/docs/source/api_doc/tensor/index.rst
new file mode 100644
index 0000000000000000000000000000000000000000..2a63245be7d01722638b78b981bb578c422337f1
--- /dev/null
+++ b/docs/source/api_doc/tensor/index.rst
@@ -0,0 +1,9 @@
+treetensor.tensor
+=====================
+
+.. toctree::
+    :maxdepth: 3
+
+    funcs.auto
+    size.auto
+    tensor.auto
diff --git a/docs/source/api_doc/tensor/size.rstc b/docs/source/api_doc/tensor/size.rstc
new file mode 100644
index 0000000000000000000000000000000000000000..7f2775e0f92233fa1968992b50516ffbc0bb7a83
--- /dev/null
+++ b/docs/source/api_doc/tensor/size.rstc
@@ -0,0 +1 @@
+treetensor.tensor.size
\ No newline at end of file
diff --git a/docs/source/api_doc/tensor/tensor.rstc b/docs/source/api_doc/tensor/tensor.rstc
new file mode 100644
index 0000000000000000000000000000000000000000..9c3b7eabc99fd0be9470a41c5e0a53f5e92c7e40
--- /dev/null
+++ b/docs/source/api_doc/tensor/tensor.rstc
@@ -0,0 +1 @@
+treetensor.tensor.tensor
\ No newline at end of file
diff --git a/docs/source/apidoc.mk b/docs/source/apidoc.mk
new file mode 100644
index 0000000000000000000000000000000000000000..8f1b71230ee092317469572f4920af3c168d2c76
--- /dev/null
+++ b/docs/source/apidoc.mk
@@ -0,0 +1,20 @@
+PYTHON        := $(shell which python)
+
+SOURCE       ?= .
+RSTC_FILES   := $(shell find ${SOURCE} -name *.rstc)
+RST_RESULTS  := $(addsuffix .auto.rst, $(basename ${RSTC_FILES}))
+
+APIDOC_GEN_PY := $(shell readlink -f ${SOURCE}/apidoc_gen.py)
+
+%.auto.rst: %.rstc ${APIDOC_GEN_PY}
+	cd "$(shell dirname $(shell readlink -f $<))" && \
+		PYTHONPATH="$(shell dirname $(shell readlink -f $<)):${PYTHONPATH}" \
+		cat "$(shell readlink -f $<)" | $(PYTHON) "${APIDOC_GEN_PY}" > "$(shell readlink -f $@)"
+
+build: ${RST_RESULTS}
+
+all: build
+
+clean:
+	rm -rf \
+		$(shell find ${SOURCE} -name *.auto.rst)
diff --git a/docs/source/apidoc_gen.py b/docs/source/apidoc_gen.py
new file mode 100644
index 0000000000000000000000000000000000000000..939814799139cc511316d4fe86638684acef9294
--- /dev/null
+++ b/docs/source/apidoc_gen.py
@@ -0,0 +1,51 @@
+import importlib
+import types
+from typing import List
+
+_DOC_TAG = '__doc_names__'
+
+
+def _is_tagged_name(clazz, name):
+    return name in set(getattr(clazz, _DOC_TAG, set()))
+
+
+def _find_class_members(clazz: type) -> List[str]:
+    members = []
+    for name in dir(clazz):
+        item = getattr(clazz, name)
+        if _is_tagged_name(clazz, name) and \
+                getattr(item, '__name__', None) == name:  # should be public or protected
+            members.append(name)
+
+    return members
+
+
+if __name__ == '__main__':
+    package_name = input().strip()
+    _module = importlib.import_module(package_name)
+    _alls = getattr(_module, '__all__')
+
+    print(package_name)
+    print('=' * (len(package_name) + 5))
+    print()
+
+    print(f'.. automodule:: {package_name}')
+    print()
+
+    for _name in sorted(_alls):
+        print(_name)
+        print('-' * (len(_name) + 5))
+        print()
+
+        _item = getattr(_module, _name)
+        if isinstance(_item, types.FunctionType):
+            print(f'.. autofunction:: {package_name}.{_name}')
+            print()
+        elif isinstance(_item, type):
+            print(f'.. autoclass:: {package_name}.{_name}')
+            print(f'    :members: {", ".join(sorted(_find_class_members(_item)))}')
+            print()
+        else:
+            print(f'.. autodata:: {package_name}.{_name}')
+            print(f'    :annotation:')
+            print()
diff --git a/docs/source/conf.py b/docs/source/conf.py
index 76135ffc93d11c39d482de0c795306846587ed67..6cdd842cf671efc0ef70f1ef6249285605a4c564 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -58,6 +58,12 @@ if not os.environ.get("NO_CONTENTS_BUILD"):
     if pip_docs.wait() != 0:
         raise ChildProcessError("Pip docs install failed with %d." % (pip.returncode,))
 
+    apidoc_cmd = (where.first('make'), '-f', "apidoc.mk", "build")
+    print("Building apidoc {cmd} at {cp}...".format(cmd=repr(apidoc_cmd), cp=repr(_DOC_PATH)))
+    apidoc = Popen(apidoc_cmd, stdout=sys.stdout, stderr=sys.stderr, env=_env, cwd=_DOC_PATH)
+    if apidoc.wait() != 0:
+        raise ChildProcessError("Diagrams failed with %d." % (apidoc.returncode,))
+
     diagrams_cmd = (where.first('make'), '-f', "diagrams.mk", "build")
     print("Building diagrams {cmd} at {cp}...".format(cmd=repr(diagrams_cmd), cp=repr(_DOC_PATH)))
     diagrams = Popen(diagrams_cmd, stdout=sys.stdout, stderr=sys.stderr, env=_env, cwd=_DOC_PATH)
diff --git a/docs/source/index.rst b/docs/source/index.rst
index 5bc3c8b5f5954ffc9e9a9290591fe852b05ecaa2..101cbb545a7ea17a04b8d579b234202a0d1a4cff 100644
--- a/docs/source/index.rst
+++ b/docs/source/index.rst
@@ -19,7 +19,9 @@ module.
     :maxdepth: 2
     :caption: API Documentation
 
+    api_doc/common/index
     api_doc/config/index
+    api_doc/tensor/index
 
 
 .. toctree::
diff --git a/treetensor/common/trees.py b/treetensor/common/trees.py
index 347f7ed21131a50ed1217623defe946d7c8d8d24..352f3b92dbe7b44d6902c965b3031d6a7c32d876 100644
--- a/treetensor/common/trees.py
+++ b/treetensor/common/trees.py
@@ -2,6 +2,8 @@ from abc import ABCMeta
 
 from treevalue import general_tree_value, method_treelize
 
+from ..utils import tag_names
+
 __all__ = [
     'BaseTreeStruct', "TreeData", 'TreeObject',
 ]
@@ -15,6 +17,7 @@ class BaseTreeStruct(general_tree_value(), metaclass=ABCMeta):
     pass
 
 
+@tag_names(['__eq__', '__ne__', '__lt__', '__le__', '__gt__', '__ge__'])
 class TreeData(BaseTreeStruct, metaclass=ABCMeta):
     """
     Overview:
diff --git a/treetensor/numpy/numpy.py b/treetensor/numpy/numpy.py
index eb7c3f585066225e5c83667675b9d49db6655e6a..00b2d328e0c040d0c4f8a37b3812d007e1a9fa3d 100644
--- a/treetensor/numpy/numpy.py
+++ b/treetensor/numpy/numpy.py
@@ -2,12 +2,15 @@ import numpy as np
 from treevalue import method_treelize
 
 from ..common import TreeObject, TreeData, ireduce
+from ..utils import inherit_names, current_names
 
 __all__ = [
     'TreeNumpy'
 ]
 
 
+@current_names()
+@inherit_names(TreeData)
 class TreeNumpy(TreeData):
     """
     Overview:
diff --git a/treetensor/tensor/tensor.py b/treetensor/tensor/tensor.py
index cb7a225c4d15af35ff393839fefc05bb728fff0c..671de780efd271616cdd981a76005a9811f4e00e 100644
--- a/treetensor/tensor/tensor.py
+++ b/treetensor/tensor/tensor.py
@@ -6,6 +6,7 @@ from treevalue.utils import pre_process
 from .size import TreeSize
 from ..common import TreeObject, TreeData, ireduce
 from ..numpy import TreeNumpy
+from ..utils import inherit_names, current_names
 
 __all__ = [
     'TreeTensor'
@@ -16,6 +17,8 @@ tireduce = pre_process(lambda rfunc: ((_reduce_tensor_wrap(rfunc),), {}))(ireduc
 
 
 # noinspection PyTypeChecker,PyShadowingBuiltins,PyArgumentList
+@current_names()
+@inherit_names(TreeData)
 class TreeTensor(TreeData):
     @method_treelize(return_type=TreeNumpy)
     def numpy(self: torch.Tensor) -> np.ndarray:
diff --git a/treetensor/utils/__init__.py b/treetensor/utils/__init__.py
index 17199931222a5c35b10f47fad127391c07c8476a..336167bf0935d43c33afb2e3b72b1e2371b56dd5 100644
--- a/treetensor/utils/__init__.py
+++ b/treetensor/utils/__init__.py
@@ -1 +1,2 @@
-from .func import replaceable_partial
+from .clazz import *
+from .func import *
diff --git a/treetensor/utils/clazz.py b/treetensor/utils/clazz.py
new file mode 100644
index 0000000000000000000000000000000000000000..181a4627dcad39e2adccd614645acd58b542a316
--- /dev/null
+++ b/treetensor/utils/clazz.py
@@ -0,0 +1,78 @@
+import types
+from functools import reduce
+from operator import __or__
+from typing import Iterable, TypeVar
+
+__all__ = [
+    'tag_names', 'inherit_names', 'current_names',
+]
+
+_DOC_TAG = '__doc_names__'
+_CLS_TYPE = TypeVar('_CLS_TYPE', bound=type)
+
+
+def _get_names(clazz: type):
+    return set(getattr(clazz, _DOC_TAG, set()))
+
+
+def _set_names(clazz: type, names: Iterable[str]):
+    setattr(clazz, _DOC_TAG, set(names))
+
+
+def tag_names(names: Iterable[str], keep: bool = True):
+    def _decorator(cls: _CLS_TYPE) -> _CLS_TYPE:
+        _old_names = _get_names(cls) if keep else set()
+        _set_names(cls, set(names) | _old_names)
+
+        return cls
+
+    return _decorator
+
+
+def inherit_names(*clazzes: type, keep: bool = True):
+    def _decorator(cls: _CLS_TYPE) -> _CLS_TYPE:
+        _old_names = _get_names(cls) if keep else set()
+        _set_names(cls, reduce(__or__, [_old_names, *map(_get_names, clazzes)]))
+        return cls
+
+    return _decorator
+
+
+class _TempClazz:
+    @property
+    def prop(self):
+        return None
+
+
+PropertyType = type(_TempClazz.prop)
+
+
+# noinspection PyTypeChecker
+def _is_func_property(clazz, name):
+    func = getattr(clazz, name)
+    return isinstance(func, (types.FunctionType, PropertyType)) and (
+            not hasattr(clazz.__base__, name) or getattr(clazz.__base__, name) is not func
+    )
+
+
+def _is_classmethod(clazz, name):
+    method = getattr(clazz, name)
+    return isinstance(method, types.MethodType) and (
+            not hasattr(clazz.__base__, name) or getattr(clazz.__base__, name).__func__ is not method.__func__
+    )
+
+
+def current_names(keep: bool = True):
+    def _decorator(cls: _CLS_TYPE) -> _CLS_TYPE:
+        members = set()
+        for name in dir(cls):
+            item = getattr(cls, name)
+            if (_is_func_property(cls, name) or _is_classmethod(cls, name)) and \
+                    getattr(item, '__name__', None) == name:  # should be public or protected
+                members.add(name)
+
+        _old_names = _get_names(cls) if keep else set()
+        _set_names(cls, _old_names | set(members))
+        return cls
+
+    return _decorator
diff --git a/treetensor/utils/func.py b/treetensor/utils/func.py
index b7ec1dd5fece83d3c5d7cb205270194732cbfbeb..61c15f758b6af426e9bbe374068668da67a03cfd 100644
--- a/treetensor/utils/func.py
+++ b/treetensor/utils/func.py
@@ -1,3 +1,8 @@
+__all__ = [
+    'replaceable_partial',
+]
+
+
 def replaceable_partial(func, **kws):
     def _new_func(*args, **kwargs):
         return func(*args, **{**kws, **kwargs})