but not both

or

[5] or は、包括的でも排他的でもあり得る時、 包括的 (「... or ..., but not both」) と明記しない限り、 包括的or (「... or ..., or both」) を表します。 >>4

仕様書

歴史

[1] Inline the infinite/NaN argument handling in 2d canvas methods (zcorpan著, ) https://github.com/whatwg/html/commit/6f2c0e884e3a7974637514b04e62f7352b6e405d

[2] Editorial: refactor to depend on the Infra Standard (domenic著, ) https://github.com/whatwg/html/commit/4ac633e08c2c9430853fc8322943bc2438ed36a3

[3] Editorial: tweak grammar in the definition of "or" (domenic著, ) https://github.com/whatwg/infra/commit/aeda0eaafea2d945650c5f1845625dc25a1e2ab0