成唯識論述記 5.753

5.753

述曰：謂十二處中別名法者，謂第六外處別名為法，不與餘境共同名故。此之別法，第六能了，從獨所了，以得彼名，故唯第六識若法識也，亦從不共得法識名。此能了言，即是見分；分別之言，即是相分；非謂「別」上有「了」字故，遂言了別也。或彼法處，六能了別，獨名法識，即了別言，唯在見分，亦有此義。然不共名別，是本義意。

[The Commentary states:] That which among the twelve sense-spheres (āyatana) is specifically called "phenomenon" refers to the sixth external sense-sphere being specifically named "phenomenon", because it does not share a common name with the other objects. This specific phenomenon is discerned by the sixth [consciousness]; from what is uniquely discerned, it receives that name. Therefore, only the sixth consciousness is phenomenon-consciousness; it also receives the name phenomenon-consciousness from its being exclusive (asādhāraṇa). Here the words "can discern" refer to the darśanabhāga, while the word "differentiate" refers to the nimittabhāga; it does not mean that because the word "discern" has "differentiate" after it, one simply speaks of discerning. Or [it means that] the sixth can discern that phenomenon-sphere, and so is uniquely named phenomenon-consciousness; in that case the words "discerning" reside only in the darśanabhāga—this meaning is also present. However, that it is specifically named from being non-common is the primary intention.