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Documented short DI tag syntax.

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service_container
- tags.rst

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`‎service_container/tags.rst‎`

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Original file line number	Diff line number	Diff line change
`@@ -19,8 +19,7 @@ to be used for a specific purpose. Take the following example:`
`19`	`19`	`app.twig_extension:`
`20`	`20`	`class:AppBundle\Twig\AppExtension`
`21`	`21`	`public:false`
`22`		`-tags:`
`23`		`- -{ name: twig.extension }`
	`22`	`+tags:[twig.extension]`
`24`	`23`
`25`	`24`	`..code-block::xml`
`26`	`25`
`@@ -148,13 +147,11 @@ For example, you may add the following transports as services:`
`148`	`147`	`app.smtp_transport:`
`149`	`148`	`class:\Swift_SmtpTransport`
`150`	`149`	`arguments:['%mailer_host%']`
`151`		`-tags:`
`152`		`- -{ name: app.mail_transport }`
	`150`	`+tags:[app.mail_transport]`
`153`	`151`
`154`	`152`	`app.sendmail_transport:`
`155`	`153`	`class:\Swift_SendmailTransport`
`156`		`-tags:`
`157`		`- -{ name: app.mail_transport }`
	`154`	`+tags:[app.mail_transport]`
`158`	`155`
`159`	`156`	`..code-block::xml`
`160`	`157`
`@@ -341,6 +338,26 @@ To answer this, change the service declaration:`
`341`	`338`	`$definitionSendmail->addTag('app.mail_transport', array('alias' => 'bar'));`
`342`	`339`	`$container->setDefinition('app.sendmail_transport', $definitionSendmail);`
`343`	`340`
	`341`	`+..tip::`
	`342`	`+`
	`343`	`+ In YAML format, you may provide the tag as a simple string as long as you don't need to specify additional`
	`344`	`+ attributes. The following definitions are equivalent.`
	`345`	`+`
	`346`	`+ ..code-block::yaml`
	`347`	`+`
	`348`	`+services:`
	`349`	`+`
	`350`	`+# Compact syntax`
	`351`	`+app.sendmail_transport:`
	`352`	`+class:\Swift_SendmailTransport`
	`353`	`+tags:[app.mail_transport]`
	`354`	`+`
	`355`	`+# Verbose syntax`
	`356`	`+app.sendmail_transport:`
	`357`	`+class:\Swift_SendmailTransport`
	`358`	`+tags:`
	`359`	`+ -{ name: app.mail_transport }`
	`360`	`+`
`344`	`361`	Notice that you've added a generic ``alias`` key to the tag. To actually
`345`	`362`	`use this, update the compiler::`
`346`	`363`

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`‎service_container/tags.rst‎`

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