One-Health Consensus Reference Annotation Checklist (OH-CRAC) CRAC 2.2. Variable specifications This section describes which variables / measurements were planned to be collected / taken and which metadata set / standard were used. It further specifies if measured values were planned to be grouped or classified, how this was planned to be done. It also specifies if new variables derive from the original ones (see section 4.5, New variable/unit derivation). It may overlap with the description requested for section 2.3 (Surveillance methods/strategy)