indicates the degree of certainty associated with some aspect of the text markup. [] (certainty) signifies the degree of certainty associated with the object pointed to by the certainty element. indicates more exactly the aspect concerning which certainty is being expressed: specifically, whether the markup is correctly located, whether the correct element or attribute name has been used, or whether the content of the element or attribute is correct, etc. name uncertainty concerns whether the name of the element or attribute used is correctly applied. start uncertainty concerns whether the start of the element is correctly identified. end uncertainty concerns whether the end of the element is correctly identified. location uncertainty concerns both the start and the end of the element. value uncertainty concerns the content (for an element) or the value (for an attribute) provides an alternative value for the aspect of the markup in question—an alternative generic identifier, transcription, or attribute value, or the identifier of an anchor element (to indicate an alternative starting or ending location). If an assertedValue is given, the confidence level specified by degree applies to the alternative markup specified by assertedValue; if none is given, it applies to the markup in the text. indicates one or more element(s) characterizing the conditions which are assumed in the assignment of a degree of confidenceconditions assumed in the assignment of a degree of confidence. indicates the degree of confidence assigned to the aspect of the markup named by the locus attribute. indicates the numerical accuracy or precision associated with some aspect of the text markup. [] characterizes the precision of the element or attribute pointed to by the precision element. supplies a standard deviation associated with the value in question (responsibility) identifies the individual(s) responsible for some aspect of the content or markup of particular element(s). [] indicates the specific aspect of the encoding (markup or content) for which responsibility is being assigned. name responsibility is being assigned concerning the name of the element or attribute used. start responsibility is being assigned concerning the start of the element concerned. end responsibility is being assigned concerning the end of the element concerned. location responsibility is being assigned concerning the location of the element concerned. value responsibility is being assigned concerning the content (for an element) or the value (for an attribute)