For buyers contracting authority
Pick 72212222 when the contract develops the software that runs a website or web application, rather than designing how it looks or supplying the network beneath it. Website and portal builds, content-management platforms, and the server-side development that powers them belong here.
The boundary that trips contracting authorities is design versus development. World wide web (www) site design services (72413000) covers the visual and information-architecture work; 72212222 covers building the web server software itself. Where a single contract bundles design, build and hosting, set the primary CPV code by the dominant deliverable, which on these tenders is usually the build.
Two neighbours inside the family matter. Internet or intranet server application development services (72422000) is the better fit when the output is a server-side application rather than the web-serving platform specifically. The broader sibling Networking software development services (72212210) is right when network-level software, not the web layer, is the dominant theme. When the scope spans several of these with none dominant, the parent 72212200 is the safer tag.