Does anyone know what I would set as the value for the "content" attribute if I'm utilizing the Diagnostic and Statistical Manual of Mental Disorders (DSM)?
<span itemprop="code" itemscope itemtype="http://schema.org/MedicalCode">
<meta itemprop="code" content="305.90"/>
<meta itemprop="codingSystem" content="_______"/>
</span>
Might the codingSystem
content value be "DSM-IV", "DSM-4", "DSM4" or "DSM-4"?