Maria de Luna india principal Cienega de Mata

I was going through the Info Matrimoniales for Asientos today and came across the following entry for a marriage between Antonio Moreno and Maria de Luna:

https://www.familysearch.org/ark:/61903/3:1:S3HT-D8S7-X38?i=183&wc=M6QX-QWG%3A64895301%2C64895302%2C65497701&cc=1502404

Antonio Moreno mulato libre:

Orig. de Aguascalientes, resident 3 years de este parte (Asientos)
-de padres no conocidos

Dna. Maria de Luna, india principal
Orig. de Cienega de Mata, vecina en este 4 anos
-parents: Dn. Nicolas de Luna and Ana de la Cruz

Citation:
"México, Aguascalientes, registros parroquiales, 1620-1962," database with images, FamilySearch (https://familysearch.org/ark:/61903/3:1:S3HT-D8S7-X38?cc=1502404&wc=M6QX-QWG%3A64895301%2C64895302%2C65497701 : 20 May 2014), Asientos > Nuestra Señora de Belén > Información matrimonial 1715-1721 > image 184 of 664; parroquias Católicas, Aguascalientes (Catholic Church parishes, Aguascalientes).

I have never myself come across an entry for an india principal, and thought this entry may be of interest to anyone with the de Luna name from Cienega de Mata.

Regards
Denise