anchor.diff:  expression-like syntax].
   <7> The input to the generator. In this case, the generator will produce a 40
   character alphanumeric value including upper and lowercase characters.
  +<8> Parameters can be included in the template message. This informs the
  +user about generated values.
   ====
   
   [[writing-object-list]]
  
positive.code: metadata:
    name: "cakephp-mysql-example" <1>
    annotations:
      description: "An example CakePHP application with a MySQL database" <2>
      tags: "instant-app,php,cakephp,mysql" <3>
      iconClass: "icon-php" <4>
  ----
  <1> The name of the template as it will appear to users.
  <2> A description of the template.
  <3> Tags to be associated with the template for searching and grouping.
  <4> An icon to be displayed with your template in the web console.
  ====
  
  [[writing-labels]]
  
negative.code:     description: A secret string used to configure the GitHub webhook
      generate: expression <6>
      from: "[a-zA-Z0-9]{40}" <7>
  message: "... The GitHub webhook secret is ${GITHUB_WEBHOOK_SECRET} ..." <8>
  ----
  <1> This value will be replaced with the value of the `*SOURCE_REPOSITORY_URL*`
  parameter when the template is instantiated.
  