- added "advertisement", i.e. publishing of metadata via MQTT every x seconds
  - light refactoring of source code for streaming via MQTT
  - bug fix in the streaming scheduler

  - changed "schema.org" to http in instead of https

  - changed "schema.org" to http in instead of https

  - fixed streaming of semantic measurements

enforced provision of uncertainty, semantic path resolution for observations and measurement results

  - added "all" query parameter for semantics, to request complete semantic data model
  - fixed bug when requesting enum or time measurements and parameters