medium-neutral citation : a citation consisting of data elements that retain their meaning regardless of the format in which the case is published, printed or electronic.
For example, page numbering is not medium-neutral because a case can be printed in a variety of font sizes or margin widths that will alter page numbering, and an electronic version may use a scrollbar or other navigation tools without page numbering.
public domain citation : any difference between the terms "vendor-neutral citation" and "public domain citation" may not represent a useful distinction, since the absence of any proprietary control is the critical component of both concepts.
vendor-neutral citation : a citation that contains no proprietary data elements and makes no reference to a proprietary publication.
For example, when a court is the source of the opinion numbering and paragraph numbering, then these elements of the citation are vendor-neutral, not proprietary.
nn. 12-13 archives.library.illinois.edu/erec/AALL_Archives/8501490a/citation2.pdf