From Publishing Perspectives:
For the last 10 years, there has been exponential growth in the children’s book market, largely in the Young Adult category.
As an interesting outcome to that growth, the Book Industry Study Group (BISG) has implemented new BISAC code subject headings, migrating from Juvenile Fiction (JUV) and Juvenile Non-Fiction (JNF) to YAF (Young Adult Fiction) to YAN (Young Adult Non-Fiction).
The reason for adding the YA headings is that, over time, YA has become its own subject or genre.
Although discussion around the codes has gone on since 2003, it wasn’t until 2014 that the idea of creating a new section devoted to young adult books began to gain more ground. After a survey of BISG’s entire membership showed that more than 80 percent of members would find it valuable if the BISAC included specific codes for teen/young adult content, talks were undertaken with some of the biggest stakeholders—such as Penguin Random House, Nielsen, Barnes and Noble—to define the benefits of this change.
Stakeholders noted that YA content would benefit from its own designation for potential sales opportunities, awards tracking, and to help with unreliable audience codes and age ranges and grades.
Link to the rest at Publishing Perspectives
PG says discussions started in 2003 and new codes are announced 13 years later – another data point demonstrating that Big Publishing is not operating on internet time.