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Proxy may be replaced by the target implementation, moving horizontally (in a layer) or vertically (cross layers).
Example, should we identify the Payers-related features as interesting to migrate first.
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Example, should HFR target an interface to DHIS2 (Organisation Units).
Not all HFR features (like manage facilities hierarchy,...) must be re-implemented in the OpenIMIS .while OpenIMIS will still need search capability for facilities, reference them in the services (price lists,...) , the actual hierarchy management, facility description, grouping,... can be delegated to DHIS2:
Proxy replacement with standardisation
Replacing a proxy (by own implementation or delegation) is one opportunity to adopt existing standards.
The relevance of the various standards (FIHR,...) will be analysed prior to (re)implementation of the concerned plugins.
The migration feasibility (and cost) is probably the major concern for this transformation. One alternative is to have several implementations of specific modules, to be chosen according to each project's needs.