anchor.diff:  The APIM Expression Language (EL for short) is one of the key features
   that can be used by API publishers to configure various aspects and services of an API.
   
  -This expression language is a powerful language that supports querying and
  -manipulating an object graph and is based on the http://docs.spring.io/spring/docs/current/spring-framework-reference/html/expressions.html[SpEL] (Spring Expression Language).
  +The EL is a powerful language used for querying and
  +manipulating an object graph. It is based on the http://docs.spring.io/spring/docs/current/spring-framework-reference/html/expressions.html[SpEL^] (Spring Expression Language).
   This means that you can do everything described in the link.
   
   In addition, APIM extends the standard SpEL capabilities by providing extra objects and properties
  
positive.code: 
  `{#request.path.startsWith('/my/api')}`
  
  == Policies
  Expression language can be used to configure some aspects of policy configuration.
  The policy needs to specify if it supports EL or not.
  
  == Mixin
  
negative.code: `{#properties['my-property']}`
  
  === Endpoints
  When you define endpoints for your API, you need to give them a _name_ which
  must be a unique identifier across all endpoints of the API. This identifier can be used to get an endpoint reference (i.e. uri).
  
  For example: when you create an API, a _default_ endpoint is created,
  corresponding to the value you set for the backend property. This endpoint can
  be retrieved with EL by using the following syntax:
  
  `{#endpoints['default']}`
  
  