Dave Winer released an update to his opmlPackage NPM module in May 2022, adding a feature to be able to include other OPML files within an OPML file. I wanted to create a demo of this feature and show the outlines within a web app. I combined code from the outlineBrowser toolkit to create an Express application demonstrating this feature. A live demo is available here – check it out! Comments and suggestions welcome on the Github repo. Ken Smith and Frank McPherson were collaborators on this demo, I appreciate their input!