What does “ATTR_” mean in the libSlice Quality Class documentation?
“ATTR_” is used to indicate the term as a specific attribute associated with the quality classes. For instance ATTR_Quality_Same_Strand has a very precise meaning and always implies ATTR_Quality_Strand. Some of the attributes in the quality classes have a “Not” prefix, which means the attribute is not present in the slice. This was necessary to precisely define class 23b which means that there are no reads in the slice that support the consensus (this is very strong evidence the consensus has been miscalled).
