format fields

The title, name, desc and content props may contains templating tags.

For example, the title I have {{ 2 + 1 }} documents will be rendered as I have 3 documents.

The paxpar engine use the jinja2 library.

The context dictionnary available in the template have these keys/values: (from low to high priority):

• all root node children with node.id as key
• all current node children with node.id as key
• all props of the node with prop.name as key
• node : the current node
• children : the node children (self.children)
• root : the root node of the checklist in its current state (self.root)
• some functions (see SEC_EVAL_DEFAULT_ALLOWED_NAMES):
  • len
  • sum

TODO:

• describe priority/shadowing
• link with assert/show