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Well known struct tags

Background

Go offers struct tags which are discoverable via reflection. These enjoy a wide range of use in the standard library in the JSON/XML and other encoding packages.

The community welcomed them and has built ORMs, further encodings, flag parsers and much more around them since, especially for these tasks, single-sourcing is beneficial for data structures.

Problem description

Due to increased usage of Go and thus Go struct tags, clashes become inevitable.

Solution

The list below is a best effort to document well-known struct tags used by packages which are available to the public.

Format of the list

Example entry

Tag Documentation
xml https://pkg.go.dev/encoding/xml

Change Management

List entries can be added by anyone who creates a public package where a new tag is used. List entries can be removed when the links to the package documentation stops working or the author(s) of that package requests it.

List of well-known struct tags