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Version Format · dotnet/aspnet-api-versioning Wiki · GitHub
Services are versioned using a major and minor version scheme with an optional version group and status. The version format has the following forms:
[Version Group.]<Major>.<Minor>[-Status]
<Version Group>[<Major>[.Minor]][-Status]
A version group has the format of YYYY-MM-DD. This component can be used in your services to logically group service endpoints. The version status allows you to provide a condition to a version such as Alpha, Beta, RC, and so on. While the status is optional, either the version group or the major and minor versions must be specified.
Requesting a Version of a Service
By default, clients must explicitly request the version of a service via the api-version query string parameter or URL path segment per the Microsoft REST Guidelines for versioning. It is possible to customize this behavior for legacy and other non-compliant services, which will be covered in the Advanced Versioning topic.
When versioning by URL segment, the v
prefix is neither required nor part of the API version.
The following outlines examples of various service version formats:
- /api/foo?api-version=1.0
- /api/foo?api-version=2.0-Alpha
- /api/foo?api-version=2015-05-01.3.0
- /api/v1/foo
- /api/v2.0-Alpha/foo
- /api/v2015-05-01.3.0/foo
Custom API Version Format Strings
The ApiVersion implements IFormattable and uses the ApiVersionFormatProvider for formatting by default. The following table outlines the supported format specifiers.
Format
Specifier Description Examples F Full API version as
[group version][.major[.minor]][-status] 2017-05-01.1-RC ->
2017-05-01.1-RC FF Full API version with optional minor version as
[group version][.major[.minor,0]][-status] 2017-05-01.1-RC ->
2017-05-01.1.0-RC G Group version as yyyy-MM-dd 2017-05-01.1-RC ->
2017-05-01 GG Group version as yyyy-MM-dd with status 2017-05-01.1-RC ->
2017-05-01-RC y Group version year from 0 to 99 2001-05-01.1-RC -> 1 yy Group version year from 00 to 99 2001-05-01.1-RC -> 01 yyy Group version year with a minimum of three digits 2017-05-01.1-RC -> 017 yyyy Group version year as a four-digit number 2017-05-01.1-RC -> 2017 M Group version month from 1 through 12 2001-05-01.1-RC -> 5 MM Group version month from 01 through 12 2001-05-01.1-RC -> 05 MMM Group version abbreviated name of the month 2001-06-01.1-RC -> Jun MMMM Group version full name of the month 2001-06-01.1-RC -> June d Group version day of the month, from 1 through 31 2001-05-01.1-RC -> 1 dd Group version day of the month, from 01 through 31 2001-05-01.1-RC -> 01 ddd Group version abbreviated name of the day of the week 2001-05-01.1-RC -> Mon dddd Group version full name of the day of the week 2001-05-01.1-RC -> Monday v Minor version 2001-05-01.1-RC -> 1
1.1 -> 1 V Major version 1.0-RC -> 1
2.0 -> 2 VV Major and minor version 1-RC -> 1
1.1-RC -> 1.1
1.1 -> 1.1 VVV Major, optional minor version, and status 1-RC -> 1-RC
1.1 -> 1.1 VVVV Major, minor version, and status 1-RC -> 1.0-RC
1.1 -> 1.1
1 -> 1.0 S Status 1.0-Beta -> Beta p Padded minor version with default of two digits 1.1 -> 01
1 -> 00 p[n] Padded minor version with N digits p2: 1.1 -> 01
p3: 1.1 -> 001 P Padded major version with default of two digits 2.1 -> 02
2 -> 02 P[n] Padded major version with N digits P2: 2.1 -> 02
P3: 2.1 -> 002 PP Padded major and minor version with a default of two digits 2.1 -> 02.01
2 -> 02.00 PPP Padded major, optional minor version, and status with a default of two digits 1-RC -> 01-RC
1.1-RC -> 01.01-RC PPPP Padded major, minor version, and status with a default of two digits 1-RC -> 01.00-RC
1.1-RC -> 01.01-RC
var apiVersion = new ApiVersion( 1, 0 );
Console.WriteLine( "Welcome to version " + apiVersion.ToString( "V" ) );
apiVersion = new ApiVersion( 1, 1, "Beta" );
var message = string.Format( "Welcome to version {0:VV}{0:' ('S')'}", apiVersion );
Console.WriteLine( message );
apiVersion = new ApiVersion( 2, 0 );
message = string.Format( "Welcome to version {0:VV}{0:' ('S')'}", apiVersion );
Console.WriteLine( message );
// Output: Welcome to version 1
// Output: Welcome to version 1.1 (Beta)
// Output: Welcome to version 2.0
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