===== Entity ===== [[dido:public:ra:xapend:xapend.a_glossary:start| Return to Glossary ]] The system components are called **Entities** because they all inherit from the Entity [[dido:public:ra:xapend:xapend.a_glossary:c:class|class]]. Each Entity has specialised [[dido:public:ra:xapend:xapend.a_glossary:q:qos|QoS]] policies. An Entity may have a [[dido:public:ra:xapend:xapend.a_glossary:l:listener|Listener]], a call back [[dido:public:ra:xapend:xapend.a_glossary:i:interface|interface]] for notifications about changes in the Entity’s state or, a wait interface (using WaitSets) for detecting changes in the Entity’s state. Source: [[https://istkb.adlinktech.com/article/vortex-opensplice-dds-glossary/ | OpenSplice Glossary]]