Hi Matt. Was thinking about whole-rule templates, wanted to run some ideas. Would we assume that templates like this would generally only be used with tooling? ie not so much with plain text editors? If so, then why not use some well formed document for a template: <template>Some text <field type='int' id='f1'/> here </template> To use, the data is simply the same, but with a value filled in the "field" tag. This is easy to parse, and easy to build GUI for. We can then use MVEL templating to render the values from the "field" tags into an actual rule. Thoughts? Alternative is a more DSL like approach where the text goes through a proper parser (like you have been working on). Michael.