Hazards for the SDS come in two varieties: Purple book hazards for section 2 and associated orange book hazards for section 14.
Precautions come in the GHS variety or hand edited by you. In fact, you must edit those precautions which contain ellipses (...). Any precaution may be reworded to suit the needs of the SDS.
Precautions may be tagged for any section including 14.
When a substance gets its intrinsic physical properties during data entry, the GHS classification changes and SDS hazards (except for manually added hazards and/or edited hazards) are regenerated from scratch every time you click [Save].
All GHS hazards and precautions are represented as Reference Hazards and Reference Precautions. Each reference hazard has the correct reference precautions attached as per the purple book. It also has the correct reference pictograms (if any) attached. The signal word - danger or warning - is associated with the GHS hazard.
If the reference hazard has an associated UNRTDG transport hazard, the transport pictogram(s) if any will also be attached.
Some jurisdictions have their own home-grown hazards. These exist in the system as reference hazards for particular jurisdictions. They too may have pre-associated precautions and pictograms. Jurisdictional hazards automatically replace GHS hazards in that jurisdiction if they use the same H-code number. Otherwise they need to be added manually.
Jurisdictions which don't recognise certain GHS hazards may have those hazards automatically excluded from the SDS displayed in their jurisdiction.
Each single reference hazard (of any flavour) may have up to two pictograms for the GHS hazard plus up to another two pictograms for its associated DG class - plus any number of GHS reference precautions.
In addition to hazards with their associated precautions and pictograms there are stand-alone Phrases which are arbitrary text and may appear anywhere you like. These are potentially shareable with other users.
All this is background to help understand the theory of operation.