This relation was soon by the canonists identified with the blood-tie which connects real parents with their offspring, and the corollary drawn that children, who in baptism had the same god-parent, were real brothers and sisters, who might not marry either each the other or real children of the said god-parent.
From this time on, canonists began to exercise their individual judgment in arranging their collections according to some systematic order, grouping their materials under divisions more or less happy, according to the object they had in view.
Tion began to appear; the collections of texts, the number of which continued to increase, were clearly separated from the commentaries in which the canonists continued the formation and interpretation of the law.
The " decretalists " commented on the new collection, as the " decretists " had done for that of Gratian; but the canonists were not legislators: even the summaries which they placed at the head of the chapters could not be adduced as legislative texts.
The abstract law was to be found rather in the Summae of the canonists than in the decretals.