Starchart
just for clarification
"According to the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition, Text Revision (DSM-IV-TR)7 and International Classification of Diseases, Tenth Revision (ICD-10)8 classifications, autism is characterized by impairments in 3 behavioral domains: 1) social interaction; 2) language, communication, and imaginative play; and 3) range of interests and activities.7 Assignment to 1 of 5 subtypes is based on the number and distribution of endorsed behavioral descriptors in each of the domains, as well as on the age at onset. The 5 DSM-IV PDD subtypes are 1) autistic disorder (classic autism), 2) Asperger disorder (language development at the expected age, no mental retardation), 3) disintegrative disorder (behavioral, cognitive, and language regression between ages 2 and 10 years after entirely normal early development, including language), 4) PDD not otherwise specified (individuals who have autistic features and do not fit any of the other subtypes), and 5) Rett disorder (a genetic disorder of postnatal brain development, caused by a single-gene defect predominantly affecting girls)."
From The Genetics of Autism 2004
And from the 2007 paper mentioned above
"ASDs represent 3 of the pervasive developmental disorders defined in the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition (DSM-IV),3 and the newer Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition, Text Revision (DSM-IV-TR)4: autistic disorder (AD), Asperger syndrome (AS [this terminology will be used in this report, although ?Asperger's disorder? is used in the aforementioned publications]), and pervasive developmental disorder?not otherwise specified (PDD-NOS). In addition to being a spectrum disorder, autism has wide variability with respect to the presence and intensity of symptoms, even within the DSM-IV-TR categories, which indicates that there may be additional subtypes."