In B, however, we read instead ZARE . The most common variation involves omissions. If a manuscript has been corrected, these readings should be noted. If there are multiple correctors, care should be taken to distinguish them. Which is more effective may depend on the frequency and nature of the corrections.
Editors disagree about the exact amount of variation to be recorded in a collation.
Some, e.g., would include nu movable, while others would omit it. Most would exclude punctuation, since this is known not to be original. Itacisms are also frequently excluded. The use of Nomina Sacra normally is not noted unless an abnormal form is used or in some way it affects the interpretation. Another difficulty arises with damaged texts.