xdg-desktop-portal works by exposing a series of D-Bus interfaces known as portals under a well-known name (org.freedesktop.portal.Desktop) and object path (/org/freedesktop/portal/desktop). The portal interfaces include APIs for file access, opening URIs, printing and others.
acquired package info from repodata DB: repodata/5465cf855063c3e8815c5ac39d5b5779f063c1286a4628c6c15e5749e728ef1b-primary.sqlite.bz2