DAZ Studio 4.0.3.x produces files using version 0.5.0.0 of this specification, which is not published. The DAZ Studio 4.5.x Release Candidate was the first version available to the general public that produced files which are consistent with this specification. The current version of DAZ Studio is annotated here.
The DAZ Scene Object Notation (DSON) file format is meant to be a lightweight format that captures the creation of a scene as a collection of assets with defined relationships. This format is not intended to be fully backward compatible with Poser content, although extensive efforts have been made to accommodate features of the Poser file format for features that are common to Poser and DAZ Studio.
DAZ has traditionally delivered content to users in one of three formats: Poser (*.pz3,*.cr2, *pz2, *.pp2, etc.), DAZ Studio Native Scene (*.daz), and DAZ Script (*.ds, *.dsa, *.dsb, *.dse). Each of these formats, with the exception of DAZ Script, are primarily intended to be content development formats. They support a very low level of granularity and a high level of content functionality.
The DAZ Studio Native Scene (*.daz) format is a binary, object-serialization format that provides an extensible storage scheme but can only be reasonably read by DAZ Studio itself due to its tight binding to DAZ Studio data structures. It is not intended to be a transport format and would be very difficult for another application to parse and use.
Poser format is text-based, but not based on any modern format standards. Choosing instead to follow loose rules in its syntax which make parsing the file slow and error-prone. This also causes an inability to support SAX-style parsing and delay loading of file segments.
The DSON format is capable of delivering content in a form that is designed for legal sharing, is simple to parse due to its JSON syntax, supports delayed loading, and can be delivered over the web.