The following mapping principles were used to develop the map.

1. Mapping to a Semantic Match

The map was developed, based on the principle that the source and target codes of 'equivalent' maps must be an exact semantic match.

For more information on the semantic representation of codes in the source and target terminologies please refer to 3.1 Comparison of Dose Form Semantics.

2. Transform Dose Forms

As a general principle. if there is a PDF that undergoes a transform to another PDF (e.g. "Powder for intravesical solution") whose transformed dose form (the administrable dose form) would be "Intravesical solution", the transformed PDF concept should be available in SNOMED CT International content even if there are no CDs that directly require it.  Some extensions may model "administrable CDs" or equivalent concepts and require the administrable dose form.

Please Add Other Principles Here

Capsule dose forms

Situations where it would appear that EDQM is "defining by exclusion"

Statements like "xxx are excluded" are not part of the definition of the concept, they are guidance to manufacturers when selecting a dose form for a product to be explicit rather than select what is in effect a grouper concept.

For example: "Oromucosal" is a grouper site in EDQM, just as it is in SNOMED CT, even though it might appear that the child concepts (like sublingual) are excluded.  Therefore, a 1..1 exact match between an oromucosal concept in EDQM and an oromucosal concept in SNOMED CT is acceptable.

Translations

Need to be mindful of translation of PDF concepts and supporting concepts - e.g. oromucosal = buccale (Fr); buccal = buccogingival (Fr) an Spanish uses buccale for both

No match concepts

Thread, wound stick - try to find a more appropriate dose form for any individual RCD/CD that is authorised with these dose forms which are not well enough defined for addition to SNOMED CT.  See also below about medical devices

The device/physical object boundary

Some dose forms and the products that use them cross the boundary into physical objects/medical devices - this includes "medicated thread" used in dental impressions

Medicated sponge has a 1..* map as SNOMED CT is explicit about where the sponge is located.  These will need to be mapped on a case by case basis per product

Especially for ears, nose etc.  “Wash” is about “in and out” rather than (for example, a simple solution) being left in situ to have a (local) therapeutic effect 

Drops and Sprays

Use of the grouper concepts for CDs in International Edition

Use of only 3 attributes - no basic dose form so no transformation as cannot be entirely sure whether there will be one or not