✌🏿✍🏿WebSub https://www.w3.org/TR/websub/ is something that allows for "real time" updates for RSS (you give a callback URL and everytime a feed or a matching prefix is updated, the URL is hit). That would make my attempt to parse this meaningless but I don't know how many things (like NetNewsWire) implement it and I don't want to leave those folks out.
GNU social JP is a social network, courtesy of GNU social JP管理人. It runs on GNU social, version 2.0.2-dev, available under the GNU Affero General Public License.
All GNU social JP content and data are available under the Creative Commons Attribution 3.0 license.