Unit 3 / Package Manager (2)

::xo::Package provides a simple page-contract interface, similar to ad_page_contract

• Page contracts (see ad page contract) negotiate both a required and provided feature set between the template (*.adp) and the script (*.tcl) or the request and the script, respectively.
• The required features include expected request parameters, optional validation, default values etc.
• The provided feature include properties, i.e. variable that will be accessible within the scope of the affiliated template.