Yes, good point: As of DSM-5, there is no longer an Asperger's diagnosis as it became part of Autism Spectrum Disorder (ASD). Here is the CDC link on diagnosing ASD, and it contains this note:
Originally Posted by CDC: DSM-5 criteria for diagnosis of ASD
Note: Individuals with a well-established DSM-IV diagnosis of autistic disorder, Asperger’s disorder, or pervasive developmental disorder not otherwise specified should be given the diagnosis of autism spectrum disorder. Individuals who have marked deficits in social communication, but whose symptoms do not otherwise meet criteria for autism spectrum disorder, should be evaluated for social (pragmatic) communication disorder.
As DSM-5 was released in May 2013, one can often tell whether the material one is reading is older than that (if it mentions Asperger's) or newer than that (if it mentions ASD).