gistfile1.txt

<j:jelly .... xmlns:local="local">

  <d:taglib uri="local">
    <d:tag name="radio">
      ...
      ${attrs.name}
    </d:tag>
  </d:taglib>


  .... <local:radio name="Foo"/>
</j:jelly>

gistfile2.txt

[
  {
    displayName: "Job and workflows",
    id: "...",
    org: [
      {
        id: "...",
        displayName: "Freestyle project",
        description: "<p>foo bar <b>zot</b></p>"
      },
    ]
  },
  {
    ...
  }
]

gistfile3.txt

http://localhost:8080/jenkins/extensionList/hudson.model.TopLevelItemDescriptor/api/json?pretty=true&tree=items[displayName,id,category[id,displayName,ordinal],newInstanceDetailHtml]

{
  "items" : [
    {
      "displayName" : "Freestyle project",
      "id" : "hudson.model.FreeStyleProject",
      "category" : {
        "displayName" : "Job and workflows",
        "id" : "Category.JobAndWorkflows",
        "ordinal" : 0.0
      },
      "newInstanceDetailHtml" : "<div>This is the central feature of Jenkins. Jenkins will build your project, combining any SCM with any build system, and this can be even used for something other than software build.</div>"
    },
    {
      "displayName" : "Maven project",
      "id" : "hudson.maven.MavenModuleSet",
      "category" : {
        "displayName" : "Job and workflows",
        "id" : "Category.JobAndWorkflows",
        "ordinal" : 0.0
      },
      "newInstanceDetailHtml" : "<div>Build a maven project. Jenkins takes advantage of your POM files and drastically reduces the configuration.</div>"
    },
    {
      "displayName" : "External Job",
      "id" : "hudson.model.ExternalJob",
      "category" : {
        "displayName" : "Job and workflows",
        "id" : "Category.JobAndWorkflows",
        "ordinal" : 0.0
      },
      "newInstanceDetailHtml" : "<div>This type of job allows you to record the execution of a process run outside Jenkins, even on a remote machine. This is designed so that you can use Jenkins as a dashboard of your existing automation system. See <a href=\"http://wiki.jenkins-ci.org/display/JENKINS/Monitoring+external+jobs\">the documentation for more details</a>.</div>"
    },
    {
      "displayName" : "Multi-configuration project",
      "id" : "hudson.matrix.MatrixProject",
      "category" : {
        "displayName" : "Job and workflows",
        "id" : "Category.JobAndWorkflows",
        "ordinal" : 0.0
      },
      "newInstanceDetailHtml" : "<div>Suitable for projects that need a large number of different configurations, such as testing on multiple environments, platform-specific builds, etc.</div>"
    }
  ]
}