Property List lets you write a bunch of properties in one object in a simple file. This format and object is taken from the CMF. However the CMF loads the properties into a Folder. This has all the properties in a standard object and is compatible with external editor.

For example:

foo:string=bar
bar:string=foo

<dtml-with ProperytListObject>
<dtml-var foo>
</dtml-with>