| --- |
| title: Well-known struct tags |
| --- |
| |
| ## Background |
| |
| Go offers [struct tags](https://go.dev/ref/spec#Tag) 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](https://go.dev/ref/spec#Tag), 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 |
| * Struct tag as extracted by calling https://pkg.go.dev/reflect#StructTag.Get with this tag as the `key` argument. |
| * Documentation link of this package using https://pkg.go.dev |
| |
| ### 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 |
| Tag | Documentation |
| ----------|--------------- |
| xml | https://pkg.go.dev/encoding/xml |
| json | https://pkg.go.dev/encoding/json |
| asn1 | https://pkg.go.dev/encoding/asn1 |
| reform | https://pkg.go.dev/gopkg.in/reform.v1 |
| dynamodbav | https://docs.aws.amazon.com/sdk-for-go/api/service/dynamodb/dynamodbattribute/#Marshal |
| bigquery | https://pkg.go.dev/cloud.google.com/go/bigquery |
| datastore | https://pkg.go.dev/cloud.google.com/go/datastore |
| spanner | https://pkg.go.dev/cloud.google.com/go/spanner |
| bson | https://pkg.go.dev/go.mongodb.org/mongo-driver/bson |
| gorm | https://pkg.go.dev/github.com/jinzhu/gorm |
| yaml | https://pkg.go.dev/gopkg.in/yaml.v2 |
| toml | https://pkg.go.dev/github.com/pelletier/go-toml |
| validate | https://github.com/go-playground/validator |
| mapstructure | https://pkg.go.dev/github.com/mitchellh/mapstructure |
| parser | https://pkg.go.dev/github.com/alecthomas/participle |
| protobuf | https://github.com/golang/protobuf |
| db | https://github.com/jmoiron/sqlx |
| url | https://github.com/google/go-querystring |
| feature | https://github.com/nikolaydubina/go-featureprocessing |
| graphql | https://github.com/samsarahq/thunder |
| egg | https://github.com/andrewwphillips/eggql |
| |
| |
