Unidentified Origin, n, (?) - an uncertain or undetermined fracture origin.

Other - Other terms or fracture origin types may be devised by the user if those listed in this site or C 1322 are inadequate. In such instances the user shall explicitly define the nature of the fracture origin (flaw) and whether it is inherently volume- or surface-distributed.
Examples of additional terms are "hard agglomerate", "glassy inclusion", "chip" or "closed chip".

Multiple Origins of the Same Type - A material may have multpile origins of the same type: For example, iron inclusions or tungsten inclusions. In this instance, qualify each inclusion type. For example, "iron inclusion, (I_Fe)"; and "tungsten inclusion (I_W)"

Mixed - The origin may have mixed attributes. For example, it may be composed of both a pore and a large grain.

a. If one origin type is primary, then use an ampersand symbol (&) between the primary and secondary origin codes: P^v&LG^v
b. If it is not possible to determine which is primary, then use a slash bewteen the codes: A^v/P^v to indicate the primary origin could be either an agglomerate and a pore.
c. If two flaws linked to create a larger flaw, then use a plus symbol (+) to denote the combined origin: P^v+MD^s

Uncertain - If the identity can be estimated, but is not certain, then a question mark (?) may be appended to the code: P^v?

Not Examined - If a specimen is not examined, use a hypen (-) symbol in the report or graph.