OPENCOSS action addressed status artefact assurance project assurance project evidence type body of evidence CCL CCL-information chains of evidence confirmation confirmation of change current evidence item evaluation categorie evaluation criteria evidence characterization model evidence information characteristics of evidence item evidence item evidence items of an assurance project evidence repository evidence repository of an assurance project evidence traceability link evidence type of the current evidence item evidence types of the evidence item existing evidence characterization model external tool history of change HTML file information of the evidence item intermediate-node OPENCOSS platform PDF ; RTF ; and MS word format pending action possible change rationale report SAEM model set of evidence item source evidence type source of evidence traceability link specification status of action target evidence type target of evidence traceability link time and date of action evidence traceability link type traceability matrix traceability visualization tree-view user