Ablock libraryis a collection of blocks that you can use in a Simulink^®模型。您可以从内置的Simulink库创建块的实例，并且可以为创建的块实例制作自定义库。金宝app

You can access the built-in libraries from the Simulink Library Browser. However, you cannot modify these libraries. For more information on built-in libraries, see块库. To enable others to create custom blocks, you can create your own block library and add it to the Library Browser.

Creating your own libraries is a useful componentization technique for:

要了解如何使用自定义库与其他Simulink组件化技术进行比较，请参见金宝appComponent-Based Modeling Guidelines.

When you add blocks from a custom library to a model, the block you add becomes alinked block. A linked block connects to the library block by way of alibrary link. The library block is theprototype block, and the linked block in the model is aninstanceof the library block.

The linked block looks and acts like the library block. However, if you change the library block, you must update the link on the instances. Changing an instance can also require additional steps. To learn how linked blocks work, seeLinked Blocks.