There are numerous tools that NRCs may need, depending on the extent to which they customize or extend the SNOMED CT International Edition.

The tools necessary for an NRC depend on what services the NRC will deliver and what approach the NRC will take to deliver its services. However, at a minimum, an NRC needs a platform where SNOMED CT can be made available to users, i.e. a tool to support distribution to users of the International Edition (received from IHTSDOSNOMED International) and potential National Extensions. Moreover, if the NRC decides to develop National Extensions, including a national translation or national Reference sets, tools are also required to support these tasks. Figure 8 shows various types of tooling that an NRC can utilize use to support its work with SNOMED CT.

Later sections of this document present the typical practice and tools related to each of the above work tasks .

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SNOMED International Tooling service

NRCs are free to choose or develop tools to enable distribution and management of SNOMED CT and national derivatives in their countries. However, IHTSDO SNOMED International puts great effort into development of IHTSDO SNOMED International tooling services, which represent a range of services and tools that have been made available to support IHTSDOSNOMED International, Members, and the Community of Practice. Over time, IHTSDO SNOMED International aims to include tools necessary to support the full range of essential NRC functions in its tooling services.

Tooling service developments are now based on the IHTSDOSNOMED International's Open Tooling Framework (OTF) and the source code is made available under an Apache v2 open source licence (where feasible). This framework is a set of standardized application programming interfaces (APIs), bound by a set of principles that define fundamental software services. These services are consumed by business applications, which are being developed to satisfy the tooling requirements of IHTSDO SNOMED International and its Members. IHTSDO

SNOMED International tooling services are listed at httphttps://www.ihtsdotoolssnomed.org, and the service status page at http://status.ihtsdotools.org provides real time monitoring on the availability of IHTSDO tooling services/software-tools.

Details of implementation tooling are also provided on the SNOMED CT Implementation Support Portal.

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