update index of docs

Signed-off-by: NTing Wang <kathy.wangting@huawei.com>

lite/docs/source_en/api/context.md

-# mindspore::lite
-
-## Allocator
-
-Allocator defines a memory pool for dynamic memory malloc and memory free.
-
-## Context
-
-Context is defined for holding environment variables during runtime.
-
-**Constructors & Destructors**
-
-```
-Context()
-```
-
-Constructor of MindSpore Lite Context using default value for parameters.
-
-```
-Context(int thread_num, std::shared_ptr< Allocator > allocator, DeviceContext device_ctx)
-```
-Constructor of MindSpore Lite Context using input value for parameters.
-
-- Parameters
-
-    - `thread_num`: Define the work thread number during the runtime.
-
-    - `allocator`: Define the allocator for malloc.
-
-    - `device_ctx`: Define device information during the runtime.
-
-- Returns
-
-    The instance of MindSpore Lite Context.
-
-``` 
- ~Context()
-```
-Destructor of MindSpore Lite Context.
-
-**Public Attributes**
-
-``` 
-float16_priority
-``` 
-A **bool** value. Defaults to **false**. Prior enable float16 inference.
-
-```
-device_ctx_{DT_CPU}
-```
-A **DeviceContext** struct.
-
-``` 
-thread_num_
-``` 
-
-An **int** value. Defaults to **2**. Thread number config for thread pool.
-
-``` 
-allocator
-``` 
-
-A **std::shared_ptr<Allocator>** pointer.
-
-``` 
-cpu_bind_mode_ 
-``` 
-
-A **CpuBindMode** enum variable. Defaults to **MID_CPU**.     
-
-## CpuBindMode
-An **enum** type. CpuBindMode defined for holding bind cpu strategy argument.
-
-**Attributes**
-``` 
-MID_CPU = -1
-``` 
-Bind middle cpu first.
-
-``` 
-HIGHER_CPU = 1
-``` 
-Bind higher cpu first.
-
-``` 
-NO_BIND = 0
-``` 
-No bind.
-    
-## DeviceType
-An **enum** type. DeviceType defined for holding user's preferred backend.
-
-**Attributes**
-``` 
-DT_CPU = -1
-``` 
-CPU device type.
-
-``` 
-DT_GPU = 1
-``` 
-GPU device type.
-
-``` 
-DT_NPU = 0
-``` 
-NPU device type, not supported yet.
-    
-## DeviceContext
-
-A **struct** . DeviceContext defined for holding DeviceType.
-
-**Attributes**
-``` 
-type
-``` 
-A **DeviceType** variable. The device type.
\ No newline at end of file

lite/docs/source_en/api/vision.md

-# mindspore::lite
-
-**Functions**
-``` 
-std::string Version()
-``` 
-Global method to get a version string.
-
-- Returns
-
-    The version string of MindSpore Lite.

lite/docs/source_en/apicc/apicc.rst

+C++ API
+=======
+
+.. toctree::
+  :maxdepth: 1
+
+  class_list
+  lite
+  session
+  tensor
+  errorcode_and_metatype
\ No newline at end of file

lite/docs/source_en/api/class_list.md → lite/docs/source_en/apicc/class_list.md

-Here is a list of all namespace members with links to the namespace documentation for each member:
+# Class List
+
+Here is a list of all classes with links to the namespace documentation for each member:
 
 | Namespace | Class Name | Description |
 | --- | --- | --- |
-| mindspore::lite | [Allocator](https://www.mindspore.cn/lite/docs/en/master/api/context.html#allocator) | Allocator defines a memory pool for dynamic memory malloc and memory free. |
-| mindspore::lite | [Context](https://www.mindspore.cn/lite/docs/en/master/api/context.html#context) | Context defines for holding environment variables during runtime. |
-| mindspore::lite | [ModelImpl](https://www.mindspore.cn/lite/docs/en/master/api/model.html#modelimpl) | ModelImpl defines the implement class of Model in MindSpore Lite. |
-| mindspore::lite | [PrimitiveC](https://www.mindspore.cn/lite/docs/en/master/api/model.html#primitivec) | Primitive defines as prototype of operator. |
-| mindspore::lite | [Model](https://www.mindspore.cn/lite/docs/en/master/api/model.html#model) | Model defines model in MindSpore Lite for managing graph. |
-| mindspore::lite | [ModelBuilder](https://www.mindspore.cn/lite/docs/en/master/api/model.html#modelbuilder) | ModelBuilder is defined by MindSpore Lite. |
-| mindspore::session | [LiteSession](https://www.mindspore.cn/lite/docs/en/master/api/lite_session.html#litesession) | LiteSession defines session in MindSpore Lite for compiling Model and forwarding model. |
-| mindspore::tensor | [MSTensor](https://www.mindspore.cn/lite/docs/en/master/api/ms_tensor.html#mstensor) | MSTensor defines tensor in MindSpore Lite. |
+| mindspore::lite | [Allocator](https://www.mindspore.cn/lite/docs/en/master/apicc/lite.html#allocator) | Allocator defines a memory pool for dynamic memory malloc and memory free. |
+| mindspore::lite | [Context](https://www.mindspore.cn/lite/docs/en/master/apicc/lite.html#context) | Context defines for holding environment variables during runtime. |
+| mindspore::lite | [ModelImpl](https://www.mindspore.cn/lite/docs/en/master/apicc/lite.html#modelimpl) | ModelImpl defines the implement class of Model in MindSpore Lite. |
+| mindspore::lite | [PrimitiveC](https://www.mindspore.cn/lite/docs/en/master/apicc/lite.html#primitivec) | Primitive defines as prototype of operator. |
+| mindspore::lite | [Model](https://www.mindspore.cn/lite/docs/en/master/apicc/lite.html#model) | Model defines model in MindSpore Lite for managing graph. |
+| mindspore::lite | [ModelBuilder](https://www.mindspore.cn/lite/docs/en/master/apicc/lite.html#modelbuilder) | ModelBuilder is defined by MindSpore Lite. |
+| mindspore::session | [LiteSession](https://www.mindspore.cn/lite/docs/en/master/apicc/session.html#litesession) | LiteSession defines session in MindSpore Lite for compiling Model and forwarding model. |
+| mindspore::tensor | [MSTensor](https://www.mindspore.cn/lite/docs/en/master/apicc/tensor.html#mstensor) | MSTensor defines tensor in MindSpore Lite. |
\ No newline at end of file

lite/docs/source_en/api/errorcode_and_metatype.md → lite/docs/source_en/apicc/errorcode_and_metatype.md

+# ErrorCode and MetaType
+
 Description of error code and meta type supported in MindSpore Lite.
 
-# ErrorCode
+## ErrorCode
 
 | Definition  | Value | Description |
 | ---  | --- | --- |
@@ -23,7 +25,7 @@ Description of error code and meta type supported in MindSpore Lite.
 | RET_INFER_ERR | -501 | Failed to infer shape. | 
 | RET_INFER_INVALID | -502 | Invalid infer shape before runtime. | 
 
-# MetaType
+## MetaType
 An **enum** type.
 
 | Type Name | Definition | Value | Description |

lite/docs/source_en/api/model.md → lite/docs/source_en/apicc/lite.md

-# mindspore::lite
+# mindspore::lite context
+
+## Allocator
+
+Allocator defines a memory pool for dynamic memory malloc and memory free.
+
+## Context
+
+Context is defined for holding environment variables during runtime.
+
+**Constructors & Destructors**
+
+```
+Context()
+```
+
+Constructor of MindSpore Lite Context using default value for parameters.
+
+```
+Context(int thread_num, std::shared_ptr< Allocator > allocator, DeviceContext device_ctx)
+```
+Constructor of MindSpore Lite Context using input value for parameters.
+
+- Parameters
+
+    - `thread_num`: Define the work thread number during the runtime.
+
+    - `allocator`: Define the allocator for malloc.
+
+    - `device_ctx`: Define device information during the runtime.
+
+- Returns
+
+    The instance of MindSpore Lite Context.
+
+``` 
+ ~Context()
+```
+Destructor of MindSpore Lite Context.
+
+**Public Attributes**
+
+``` 
+float16_priority
+``` 
+A **bool** value. Defaults to **false**. Prior enable float16 inference.
+
+```
+device_ctx_{DT_CPU}
+```
+A **DeviceContext** struct.
+
+``` 
+thread_num_
+``` 
+
+An **int** value. Defaults to **2**. Thread number config for thread pool.
+
+``` 
+allocator
+``` 
+
+A **std::shared_ptr<Allocator>** pointer.
+
+``` 
+cpu_bind_mode_ 
+``` 
+
+A **CpuBindMode** enum variable. Defaults to **MID_CPU**.     
+
 ## ModelImpl
 ModelImpl defines the implement class of Model in MindSpore Lite.
 
@@ -129,3 +198,62 @@ A **string** variable. ID of a node linked by this edge.
 outEdgeIndex
 ```
 A **size_t** variable. Index of this edge.
+
+## CpuBindMode
+An **enum** type. CpuBindMode defined for holding bind cpu strategy argument.
+
+**Attributes**
+``` 
+MID_CPU = -1
+``` 
+Bind middle cpu first.
+
+``` 
+HIGHER_CPU = 1
+``` 
+Bind higher cpu first.
+
+``` 
+NO_BIND = 0
+``` 
+No bind.
+    
+## DeviceType
+An **enum** type. DeviceType defined for holding user's preferred backend.
+
+**Attributes**
+``` 
+DT_CPU = -1
+``` 
+CPU device type.
+
+``` 
+DT_GPU = 1
+``` 
+GPU device type.
+
+``` 
+DT_NPU = 0
+``` 
+NPU device type, not supported yet.
+    
+## DeviceContext
+
+A **struct** . DeviceContext defined for holding DeviceType.
+
+**Attributes**
+``` 
+type
+``` 
+A **DeviceType** variable. The device type.
+
+## Version
+
+``` 
+std::string Version()
+``` 
+Global method to get a version string.
+
+- Returns
+
+    The version string of MindSpore Lite.
\ No newline at end of file

lite/docs/source_en/index.rst

@@ -11,5 +11,6 @@ MindSpore Lite Documentation
    :maxdepth: 1
 
    architecture
+   apicc/apicc
    operator_list
    glossary

tutorials/source_zh_cn/index.rst

@@ -36,6 +36,7 @@ MindSpore教程
    advanced_use/synchronization_training_and_evaluation
    advanced_use/bert_poetry
    advanced_use/optimize_the_performance_of_data_preparation
+   advanced_use/mobilenetv2_incremental_learning
 
 .. toctree::
    :glob: