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	```			```
	// Top level production			// Top level production
	toplevel := (operation \| attribute-alias-def \| type-alias-def)*			toplevel := (operation \| attribute-alias-def \| type-alias-def)*
	```			```

	The production `toplevel` is the top level production that is parsed by any parsing			The production `toplevel` is the top level production that is parsed by any parsing
	consuming the MLIR syntax. [Operations](#operations),			consuming the MLIR syntax. [Operations](#operations),
	[Attribute alises](#attribute-value-aliases), and [Type aliases](#type-aliases)			[Attribute aliases](#attribute-value-aliases), and [Type aliases](#type-aliases)
	can be declared on the toplevel.			can be declared on the toplevel.

	### Identifiers and keywords			### Identifiers and keywords

	Syntax:			Syntax:

	```			```
	// Identifiers			// Identifiers
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	### Builtin Attribute Values			### Builtin Attribute Values

	The [builtin dialect](Dialects/Builtin.md) defines a set of attribute values			The [builtin dialect](Dialects/Builtin.md) defines a set of attribute values
	that are directly usable by any other dialect in MLIR. These types cover a range			that are directly usable by any other dialect in MLIR. These types cover a range
	from primitive integer and floating-point values, attribute dictionaries, dense			from primitive integer and floating-point values, attribute dictionaries, dense
	multi-dimensional arrays, and more.			multi-dimensional arrays, and more.

	### IR Versionning			### IR Versioning

	A dialect can opt-in to handle versioning through the			A dialect can opt-in to handle versioning through the
	`BytecodeDialectInterface`. Few hooks are exposed to the dialect to allow			`BytecodeDialectInterface`. Few hooks are exposed to the dialect to allow
	managing a version encoded into the bytecode file. The version is loaded lazily			managing a version encoded into the bytecode file. The version is loaded lazily
	and allows to retrieve the version information while parsing the input IR, and			and allows to retrieve the version information while parsing the input IR, and
	gives an opportunity to each dialect for which a version is present to perform			gives an opportunity to each dialect for which a version is present to perform
	IR upgrades post-parsing through the `upgradeFromVersion` method. Custom			IR upgrades post-parsing through the `upgradeFromVersion` method. Custom
	Attribute and Type encodings can also be upgraded according to the dialect			Attribute and Type encodings can also be upgraded according to the dialect
	version using readAttribute and readType methods.			version using readAttribute and readType methods.

	There is no restriction on what kind of information a dialect is allowed to			There is no restriction on what kind of information a dialect is allowed to
	encode to model its versioning. Currently, versioning is supported only for			encode to model its versioning. Currently, versioning is supported only for
	bytecode formats.			bytecode formats.

This is an archive of the discontinued LLVM Phabricator instance.

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[mlir][doc] Fix typos
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