The direct line is divided into a direct line descending and the direct line ascending. The first is that which connects the ancestor with those who descend from him. The second is that which connects a person with those from whom he descends.
Okla. Stat. tit. 84, § 219
Ascending and descending lines
R.L. 1910, Sec. 8424
Official source: Oklahoma Legislature. Reproduced from public-domain Oklahoma statutes; confirm against the official source for the current text. Not legal advice.