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Changes for FDSN StationXML format

Changes from version 1.1 to 1.2 (2022-02-25)

Version 1.2 introduces no schema "as a schema" changes, other than the schemaVersion attribute. All changes are additions of annotations and other documentation.

Changes from version 1.0 to 1.1 (2019-5-3)

(Edited 2019-12-18 for small clarifications)

  • Add (persistent) <Identifier> element to all base nodes (Network, Station, Channel)

  • Unify response elements, allow "number" and disallow "unit" attribute to <Numerator> and <Denominator>

  • Allow <CreationDate> to be optional

  • Use xs:double for <ApproximationLowerBound>, <ApproximationUpperBound> and <MaximumError>

  • Include data availability elements described in the fdsn-station+availability-1.0.xsd extension schema as optional elements of the main schema

  • Remove <StorageFormat> from <Channel>

  • Limit each <Operator> to a single <Agency>

  • Allow more than a single <Equipment> occurrence in <Channel>, same as in <Station>

  • Allow <Operator> at the <Network> level, same as in <Station>

  • Add "sourceID" attribute, with URI value, to the base node type for <Network>,<Station>,<Channel>

  • Do not require and disallow <StageGain> and <Decimation> for <Polynomial> response stages

  • Add "measurementMethod" attribute to "uncertaintyDouble" attribute group used by azimuth, dip, distance, latitude, longitude, elevation, etc. types

  • Add <WaterLevel> within <Station> and <Channel>

  • Add "subject" attribute to <Comment> to allow relating comments, make "id" attribute optional.