OPML Editor as Writing Tool

It occurs to me that the OPML Editor is a good tool for "open ended writing". The process consists of rounds of spontaneous writing followed by the writing of summaries which then get promoted to contain the loose writing. The loose writing can be collapsed into the summaries and expanded if you want to see more of what's summarized. Summaries can suggest concepts which can be used for further indexing. This process seems to me a good way to get an overview of one's thinking and a manageable archive of ones thinking.