Changes from version 1.0 to 1.1 (2019-5-3) (Edited 2019-12-18 for small clarifications) * Add (persistent) element to all base nodes (Network, Station, Channel) * Unify response elements, allow "number" and disallow "unit" attribute to and * Allow to be optional * Use xs:double for , and * Include data availability elements described in the fdsn-station+availability-1.0.xsd extension schema as optional elements of the main schema * Remove from * Limit each to a single * Allow more than a single occurrence in , same as in * Allow at the level, same as in * Add "sourceID" attribute, with URI value, to the base node type for ,, * Do not require and disallow and for response stages * Add "measurementMethod" attribute to "uncertaintyDouble" attribute group used by azimuth, dip, distance, latitude, longitude, elevation, etc. types * Add within and * Add "subject" attribute to to allow relating comments, make "id" attribute optional.