EBNF Syntax: VHDL'93

Syntax Productions

Start Symbol (vhdl)

Name	Production
abstract_literal	decimal_literal(#1) based_literal(#1)
access_type_definition	'access' subtype_indication
actual_designator	expression(#2) name(#2) 'open'
actual_parameter_part	association_list
actual_part	actual_designator(#3) name '(' actual_designator ')'(#3) type_mark '(' actual_designator ')'(#3)
adding_operator	'+' '-' '&'
aggregate	'(' element_association { ',' element_association } ')'
alias_declaration	'alias' alias_designator [ ':' subtype_indication ] 'is' name [ signature ] ';'
alias_designator	identifier character_literal operator_symbol
allocator	'new' subtype_indication(#4) 'new' qualified_expression(#4)
architecture_body	'architecture' identifier 'of' name 'is' architecture_declarative_part 'begin' architecture_statement_part 'end' [ 'architecture' ] [ simple_name ] ';'
architecture_declarative_part	{ block_declarative_item }
architecture_statement_part	{ concurrent_statement }
array_type_definition	unconstrained_array_definition(#5) constrained_array_definition(#5)
assertion	'assert' condition [ 'report' expression ] [ 'severity' expression ]
assertion_statement	[ label ':' ] assertion ';'
association_element	[ formal_part '=>' ](#6) actual_part(#6)
association_list	association_element { ',' association_element }
attribute_declaration	'attribute' identifier ':' type_mark ';'
attribute_designator	simple_name
attribute_name	prefix [ signature ] "'" attribute_designator [ '(' expression ')' ]
attribute_specification	'attribute' attribute_designator 'of' entity_specification 'is' expression ';'
base	integer
base_specifier	'b' 'o' 'x'
based_integer	extended_digit { [ UNDERLINE ] extended_digit }
based_literal	base '#' based_integer [ '.' based_integer ] '#' [ exponent ]
basic_character (not used)	basic_graphic_character FORMAT_EFFECTOR
basic_graphic_character	UPPER_CASE_CHARACTER DIGIT SPECIAL_CHARACTER SPACE_CHARACTER
basic_identifier	letter { [ UNDERLINE ] letter_or_digit }
binding_indication	'use' entity_aspect [ generic_map_aspect ] [ port_map_aspect ]
bit_string_literal	base_specifier '"' [ bit_value ] '"'
bit_value	extended_digit { [ UNDERLINE ] extended_digit }
block_configuration	'for' block_specification { use_clause } { configuration_item } 'end' 'for' ';'
block_declarative_item	subprogram_declaration(#7) subprogram_body(#7) type_declaration subtype_declaration constant_declaration signal_declaration file_declaration alias_declaration component_declaration attribute_declaration(#8) attribute_specification(#8) configuration_specification disconnection_specification use_clause variable_declaration group_template_declaration(#9) group_declaration(#9)
block_declarative_part	{ block_declarative_item }
block_header	[ generic_clause [ generic_map_aspect ';' ] ] [ port_clause [ port_map_aspect ';' ] ]
block_specification	name(#10) label [ '(' index_specification ')' ](#10)
block_statement	label ':' 'block' [ '(' expression ')' ] [ 'is' ] block_header block_declarative_part 'begin' block_statement_part 'end' 'block' [ label ] ';'
block_statement_part	{ concurrent_statement }
case_statement	[ label ':' ] 'case' expression 'is' case_statement_alternative { ',' case_statement_alternative } 'end' 'case' [ label ] ';'
case_statement_alternative	'when' choices '=>' sequence_of_statements
character_literal	"'" graphic_character "'"
choice	simple_expression(#11)(#12) discrete_range(#11)(#12) simple_name(#12) 'others'
choices	choice { '|' choice }
component_configuration	'for' component_specification [ binding_indication ';' ] [ block_configuration ] 'end' 'for' ';'
component_declaration	'component' identifier [ 'is' ] [ generic_clause ] [ port_clause ] 'end' 'component' [ simple_name ] ';'
component_instantiation_statement	label ':' instantiated_unit [ generic_map_aspect ] [ port_map_aspect ] ';'
component_specification	instantiation_list ':' name
composite_type_definition	array_type_definition record_type_definition
concurrent_assertion_statement	[ label ':' ] [ 'postponed' ] assertion
concurrent_procedure_call_statement	[ label ':' ](#13) [ 'postponed' ] procedure_call(#13)
concurrent_signal_assignment_statement	[ label ':' ](#15) [ 'postponed' ] conditional_signal_assignment(#15)(#14) [ label ':' ] [ 'postponed' ] selected_signal_assignment(#14)
concurrent_statement	block_statement(#17) process_statement(#16)(#17) concurrent_procedure_call_statement(#16)(#17)(#18) concurrent_assertion_statement(#16)(#17) concurrent_signal_assignment_statement(#16)(#17)(#18) component_instantiation_statement(#17) generate_statement(#17)
condition	expression
condition_clause	'until' condition
conditional_signal_assignment	target '<=' options conditional_waveforms ';'
conditional_waveforms	{ waveform 'when' condition 'else' }(#19) waveform(#19) [ 'when' condition ]
configuration_declaration	'configuration' identifier 'of' name 'is' configuration_declarative_part block_configuration 'end' [ 'configuration' ] [ simple_name ] ';'
configuration_declarative_item	use_clause attribute_specification group_declaration
configuration_declarative_part	{ configuration_declarative_item }
configuration_item	block_configuration(#20) component_configuration(#20)
configuration_specification	'for' component_specification binding_indication ';'
constant_declaration	'constant' identifier_list ':' subtype_indication [ ':=' expression ] ';'
constrained_array_definition	'array' index_constraint 'of' subtype_indication
constraint	range_constraint index_constraint
context_clause	{ context_item }
context_item	library_clause use_clause
decimal_literal	integer [ '.' integer ] [ exponent ]
declaration (not used)	type_declaration subtype_declaration object_declaration(#21) interface_declaration(#21) alias_declaration attribute_declaration component_declaration entity_declaration configuration_declaration subprogram_declaration package_declaration group_template_declaration(#22) group_declaration(#22)
delay_mechanism	'transport' [ 'reject' expression ] 'inertial'
design_file	design_unit { design_unit }
design_unit	context_clause library_unit
designator	identifier operator_symbol
direction	'to' 'downto'
disconnection_specification	'disconnect' guarded_signal_specification 'after' expression ';'
discrete_range	subtype_indication(#23) range(#23)
element_association	[ choices '=>' ](#24) expression(#24)
element_declaration	identifier_list ':' element_subtype_definition ';'
element_subtype_definition	subtype_indication
entity_aspect	'entity' name [ '(' identifier ')' ] 'configuration' name 'open'
entity_class	'entity' 'architecture' 'configuration' 'procedure' 'function' 'package' 'type' 'subtype' 'constant' 'signal' 'variable' 'component' 'label' 'literal' 'units' 'group' 'file'
entity_class_entry	entity_class [ '<>' ]
entity_class_entry_list	entity_class_entry { ',' entity_class_entry }
entity_declaration	'entity' identifier 'is' entity_header entity_declarative_part [ 'begin' entity_statement_part ] 'end' [ 'entity' ] [ simple_name ] ';'
entity_declarative_item	subprogram_declaration(#25) subprogram_body(#25) type_declaration subtype_declaration constant_declaration signal_declaration variable_declaration file_declaration alias_declaration attribute_declaration(#26) attribute_specification(#26) disconnection_specification use_clause group_template_declaration(#27) group_declaration(#27)
entity_declarative_part	{ entity_declarative_item }
entity_designator	entity_tag [ signature ]
entity_header	[ generic_clause ] [ port_clause ]
entity_name_list	entity_designator { ',' entity_designator } 'others' 'all'
entity_specification	entity_name_list ':' entity_class
entity_statement	concurrent_assertion_statement(#28) concurrent_procedure_call_statement(#28) process_statement(#28)
entity_statement_part	{ entity_statement }
entity_tag	simple_name character_literal operator_symbol
enumeration_literal	identifier character_literal
enumeration_type_definition	'(' enumeration_literal { ',' enumeration_literal } ')'
exit_statement	[ label ':' ] 'exit' [ label ] [ 'when' condition ] ';'
exponent	'e' [ '+' ] integer(#29) 'e' '-' integer(#29)
expression	relation { 'and' relation }(#30) relation { 'or' relation }(#30) relation { 'xor' relation }(#30) relation [ 'nand' relation ](#30) relation [ 'nor' relation ](#30) relation { 'xnor' relation }(#30)
extended_digit	DIGIT letter
extended_identifier	'\' graphic_character { graphic_character } '\'
factor	primary [ '**' primary ] 'abs' 'not'
file_declaration	'file' identifier ':' subtype_indication [ file_open_information ] ';'
file_logical_name	expression
file_open_information	[ 'open' expression ] 'is' file_logical_name
file_type_definition	'file' 'of' type_mark
floating_type_definition	range_constraint
formal_designator	name
formal_parameter_list	interface_list
formal_part	formal_designator(#31) name '(' formal_designator ')'(#31) type_mark '(' formal_designator ')'(#31)
full_type_declaration	'type' identifier 'is' type_definition ';'
function_call	name [ '(' actual_parameter_part ')' ]
generate_statement	label ':' generation_scheme 'generate' [ { block_declarative_item } 'begin' ] { concurrent_statement } 'end' 'generate' [ label ] ';'
generation_scheme	'for' parameter_specification 'if' condition
generic_clause	'generic' '(' generic_list ')' ';'
generic_list	interface_list
generic_map_aspect	'generic' 'map' '(' association_list ')'
graphic_character	basic_graphic_character LOWER_CASE_LETTER OTHER_SPECIAL_CHARACTER
group_constituent	name character_literal
group_constituent_list	group_constituent { ',' group_constituent }
group_declaration	'group' identifier ':' name '(' group_constituent_list ')' ';'
group_template_declaration	'group' identifier 'is' '(' entity_class_entry_list ')' ';'
guarded_signal_specification	signal_list ':' type_mark
identifier	basic_identifier extended_identifier
identifier_list	identifier { ',' identifier }
if_statement	[ label ':' ] 'if' condition 'then' sequence_of_statements { 'elsif' condition 'then' sequence_of_statements } [ 'else' sequence_of_statements ] 'end' 'if' [ label ] ';'
incomplete_type_declaration	'type' identifier ';'
index_constraint	'(' discrete_range { ',' discrete_range } ')'
index_specification	discrete_range(#32) expression(#32)
index_subtype_definition	type_mark 'range' '<>'
indexed_name	prefix '(' expression { ',' expression } ')'
instantiated_unit	[ 'component' ] name 'entity' name '(' identifier ')' 'configuration' name
instantiation_list	label { ',' label } 'others' 'all'
integer	DIGIT { [ UNDERLINE ] DIGIT }
integer_type_definition	range_constraint
interface_constant_declaration	[ 'constant' ] identifier_list ':' [ 'in' ] subtype_indication [ ':=' expression ]
interface_declaration	interface_constant_declaration(#33) interface_signal_declaration(#33) interface_variable_declaration(#33) interface_file_declaration
interface_element	interface_declaration
interface_file_declaration	'file' identifier_list ':' subtype_indication
interface_list	interface_element { ';' interface_element }
interface_signal_declaration	[ 'signal' ] identifier_list ':' [ mode ] subtype_indication [ 'bus' ] [ ':=' expression ]
interface_variable_declaration	[ 'variable' ] identifier_list ':' [ mode ] subtype_indication [ ':=' expression ]
iteration_scheme	'while' condition 'for' parameter_specification
label	identifier
letter	LOWER_CASE_LETTER UPPER_CASE_LETTER
letter_or_digit	letter DIGIT
library_clause	'library' logical_name_list ';'
library_unit	primary_unit(#34) secondary_unit(#34)
literal	numeric_literal(#35)(#36) enumeration_literal(#35) string_literal(#36) bit_string_literal 'null'
logical_name	identifier
logical_name_list	logical_name { ',' logical_name }
logical_operator (not used)	'and' 'or' 'nand' 'nor' 'xor' 'xnor'
loop_statement	[ label ':' ] [ iteration_scheme ] 'loop' sequence_of_statements 'end' 'loop' [ label ] ';'
miscellaneous_operator (not used)	'**' 'abs' 'not'
mode	'in' 'out' 'inout' 'buffer' 'linkage'
multiplying_operator	'*' '/' 'mod' 'rem'
name	simple_name(#38) operator_symbol(#37) selected_name(#37)(#38) indexed_name(#37)(#38) slice_name(#37)(#38) attribute_name(#37)(#38)
next_statement	[ label ':' ] 'next' [ label ] [ 'when' condition ] ';'
null_statement	[ label ':' ] 'null' ';'
numeric_literal	abstract_literal(#39) physical_literal(#39)
object_declaration	constant_declaration signal_declaration variable_declaration file_declaration
operator_symbol	string_literal
options	[ 'guarded' ] [ delay_mechanism ]
package_body	'package' 'body' simple_name 'is' package_body_declarative_part 'end' [ 'packabge' 'body' ] [ simple_name ] ';'
package_body_declarative_item	subprogram_declaration(#40) subprogram_body(#40) type_declaration subtype_declaration constant_declaration variable_declaration file_declaration alias_declaration use_clause group_template_declaration(#41) group_declaration(#41)
package_body_declarative_part	{ package_body_declarative_item }
package_declaration	'package' identifier 'is' package_declarative_part 'end' [ 'package' ] [ simple_name ] ';'
package_declarative_item	subprogram_declaration type_declaration subtype_declaration constant_declaration signal_declaration file_declaration alias_declaration component_declaration attribute_declaration(#42) attribute_specification(#42) disconnection_specification use_clause variable_declaration group_template_declaration(#43) group_declaration(#43)
package_declarative_part	{ package_declarative_item }
parameter_specification	identifier 'in' discrete_range
physical_literal	[ abstract_literal ] name
physical_type_definition	range_constraint 'units' primary_unit_declaration { secondary_unit_declaration } 'end' 'units' [ simple_name ]
port_clause	'port' '(' port_list ')' ';'
port_list	interface_list
port_map_aspect	'port' 'map' '(' association_list ')'
prefix	name(#44) function_call(#44)
primary	name(#45) literal(#45) aggregate(#46) function_call(#45) qualified_expression(#45) type_conversion(#45) allocator '(' expression ')'(#46)
primary_unit	entity_declaration configuration_declaration package_declaration
primary_unit_declaration	identifier
procedure_call	name [ '(' actual_parameter_part ')' ]
procedure_call_statement	[ label ':' ](#47) procedure_call(#47) ';'
process_declarative_item	subprogram_declaration(#48) subprogram_body(#48) type_declaration subtype_declaration constant_declaration variable_declaration file_declaration alias_declaration attribute_declaration(#49) attribute_specification(#49) use_clause group_template_declaration(#50) group_declaration(#50)
process_declarative_part	{ process_declarative_item }
process_statement	[ label ':' ] [ 'postponed' ] 'process' [ '(' sensitivity_list ')' ] [ 'is' ] process_declarative_part 'begin' process_statement_part 'end' [ 'postponed' ] 'process' [ label ] ';'
process_statement_part	{ sequential_statement }
qualified_expression	type_mark "'" '(' expression ')'(#51) type_mark "'" aggregate(#51)
range	attribute_name(#52) simple_expression direction simple_expression(#52)
range_constraint	'range' range
record_type_definition	'record' element_declaration { element_declaration } 'end' 'record'
relation	simple_expression [ relational_operator simple_expression ]
relational_operator	'=' '/=' '<' '<=' '>' '>='
report_statement	[ label ':' ] 'report' expression [ 'severity' expression ] ';'
return_statement	[ label ':' ] 'return' [ expression ] ';'
scalar_type_definition	enumeration_type_definition integer_type_definition(#53) floating_type_definition(#53) physical_type_definition(#53)
secondary_unit	architecture_body package_body
secondary_unit_declaration	identifier '=' physical_literal ';'
selected_name	prefix '.' suffix
selected_signal_assignment	'with' expression 'select' target '<=' options selected_waveforms ';'
selected_waveforms	{ waveform 'when' choices ',' }(#54) waveform(#54) 'when' choices
sensitivity_clause	'on' sensitivity_list
sensitivity_list	name { ',' name }
sequence_of_statements	{ sequential_statement }
sequential_statement	wait_statement(#56) assertion_statement(#56) signal_assignment_statement(#55)(#56)(#57) variable_assignment_statement(#55)(#56)(#57) procedure_call_statement(#55)(#56) if_statement(#56) case_statement(#56) loop_statement(#56) next_statement(#56) exit_statement(#56) return_statement(#56) null_statement(#56) report_statement(#56)
shift_expression (not used)	simple_expression [ shift_operator simple_expression ]
shift_operator	'sll' 'srl' 'sla' 'sra' 'rol' 'ror'
sign	'+' '-'
signal_assignment_statement	[ label ':' ](#58) target(#58) '<=' [ delay_mechanism ] waveform ';'
signal_declaration	'signal' identifier_list ':' subtype_indication [ signal_kind ] [ ':=' expression ] ';'
signal_kind	'register' 'bus'
signal_list	name { ',' name } 'others' 'all'
signature	'[' [ type_mark { ',' type_mark } ] [ 'return' type_mark ] ']'
simple_expression	[ sign ] term { adding_operator term }
simple_name	identifier
slice_name	prefix '(' discrete_range ')'
string_literal	'"' { graphic_character } '"'
subprogram_body	subprogram_specification 'is' subprogram_declarative_part 'begin' subprogram_statement_part 'end' [ subprogram_kind ] [ designator ] ';'
subprogram_declaration	subprogram_specification ';'
subprogram_declarative_item	subprogram_declaration(#59) subprogram_body(#59) type_declaration subtype_declaration constant_declaration variable_declaration file_declaration alias_declaration attribute_declaration(#60) attribute_specification(#60) use_clause group_template_declaration(#61) group_declaration(#61)
subprogram_declarative_part	{ subprogram_declarative_item }
subprogram_kind	'procedure' 'function'
subprogram_specification	'procedure' designator [ '(' formal_parameter_list ')' ] [ 'pure' ] 'function' designator [ '(' formal_parameter_list ')' ] 'return' type_mark 'impure' 'function' designator [ '(' formal_parameter_list ')' ] 'return' type_mark
subprogram_statement_part	{ sequential_statement }
subtype_declaration	'subtype' identifier 'is' subtype_indication ';'
subtype_indication	[ name ](#62) type_mark(#62) [ constraint ]
suffix	simple_name character_literal operator_symbol 'all'
target	name aggregate
term	factor { multiplying_operator factor }
timeout_clause	'for' expression
type_conversion	type_mark '(' expression ')'
type_declaration	full_type_declaration(#63) incomplete_type_declaration(#63)
type_definition	scalar_type_definition composite_type_definition access_type_definition file_type_definition
type_mark	name
unconstrained_array_definition	'array' '(' index_subtype_definition { ',' index_subtype_definition } ')' 'of' subtype_indication
use_clause	'use' selected_name { ',' selected_name }
variable_assignment_statement	[ label ':' ](#64) target(#64) ':=' expression ';'
variable_declaration	[ 'shared' ] 'variable' identifier_list ':' subtype_indication [ ':=' expression ] ';'
vhdl	design_file
wait_statement	[ label ':' ] 'wait' [ sensitivity_clause ] [ condition_clause ] [ timeout_clause ] ';'
waveform	waveform_element { ',' waveform_element } 'unaffected'
waveform_element	expression [ 'after' expression ](#65) 'null' [ 'after' expression ](#65)

Variants

Terminals

Literals

Production Cross Reference

Lookahead-1 Parser First Token

Start symbol = vhdl

Name	First Tokens
abstract_literal	DIGIT
access_type_definition	'access'
actual_designator	"'" '"' '(' '+' '-' '\' 'abs' 'b' 'new' 'not' 'null' 'o' 'open' 'x' DIGIT LOWER_CASE_LETTER UPPER_CASE_LETTER
actual_parameter_part	"'" '"' '(' '+' '-' '\' 'abs' 'b' 'new' 'not' 'null' 'o' 'open' 'x' DIGIT LOWER_CASE_LETTER UPPER_CASE_LETTER
actual_part	"'" '"' '(' '+' '-' '\' 'abs' 'b' 'new' 'not' 'null' 'o' 'open' 'x' DIGIT LOWER_CASE_LETTER UPPER_CASE_LETTER
adding_operator	'&' '+' '-'
aggregate	'('
alias_declaration	'alias'
alias_designator	"'" '"' '\' LOWER_CASE_LETTER UPPER_CASE_LETTER
allocator	'new'
architecture_body	'architecture'
architecture_declarative_part	ø 'alias' 'attribute' 'component' 'constant' 'disconnect' 'file' 'for' 'function' 'group' 'impure' 'procedure' 'pure' 'shared' 'signal' 'subtype' 'type' 'use' 'variable'
architecture_statement_part	ø '"' '(' '\' 'assert' 'postponed' 'process' 'with' LOWER_CASE_LETTER UPPER_CASE_LETTER
array_type_definition	'array'
assertion	'assert'
assertion_statement	'\' 'assert' LOWER_CASE_LETTER UPPER_CASE_LETTER
association_element	"'" '"' '(' '+' '-' '\' 'abs' 'b' 'new' 'not' 'null' 'o' 'open' 'x' DIGIT LOWER_CASE_LETTER UPPER_CASE_LETTER
association_list	"'" '"' '(' '+' '-' '\' 'abs' 'b' 'new' 'not' 'null' 'o' 'open' 'x' DIGIT LOWER_CASE_LETTER UPPER_CASE_LETTER
attribute_declaration	'attribute'
attribute_designator	'\' LOWER_CASE_LETTER UPPER_CASE_LETTER
attribute_name	'"' '\' LOWER_CASE_LETTER UPPER_CASE_LETTER
attribute_specification	'attribute'
base	DIGIT
base_specifier	'b' 'o' 'x'
based_integer	DIGIT LOWER_CASE_LETTER UPPER_CASE_LETTER
based_literal	DIGIT
basic_character	DIGIT FORMAT_EFFECTOR SPACE_CHARACTER SPECIAL_CHARACTER UPPER_CASE_CHARACTER
basic_graphic_character	DIGIT SPACE_CHARACTER SPECIAL_CHARACTER UPPER_CASE_CHARACTER
basic_identifier	LOWER_CASE_LETTER UPPER_CASE_LETTER
binding_indication	'use'
bit_string_literal	'b' 'o' 'x'
bit_value	DIGIT LOWER_CASE_LETTER UPPER_CASE_LETTER
block_configuration	'for'
block_declarative_item	'alias' 'attribute' 'component' 'constant' 'disconnect' 'file' 'for' 'function' 'group' 'impure' 'procedure' 'pure' 'shared' 'signal' 'subtype' 'type' 'use' 'variable'
block_declarative_part	ø 'alias' 'attribute' 'component' 'constant' 'disconnect' 'file' 'for' 'function' 'group' 'impure' 'procedure' 'pure' 'shared' 'signal' 'subtype' 'type' 'use' 'variable'
block_header	ø 'generic' 'port'
block_specification	'"' '\' LOWER_CASE_LETTER UPPER_CASE_LETTER
block_statement	'\' LOWER_CASE_LETTER UPPER_CASE_LETTER
block_statement_part	ø '"' '(' '\' 'assert' 'postponed' 'process' 'with' LOWER_CASE_LETTER UPPER_CASE_LETTER
case_statement	'\' 'case' LOWER_CASE_LETTER UPPER_CASE_LETTER
case_statement_alternative	'when'
character_literal	"'"
choice	"'" '"' '(' '+' '-' '\' 'abs' 'b' 'new' 'not' 'null' 'o' 'others' 'x' DIGIT LOWER_CASE_LETTER UPPER_CASE_LETTER
choices	"'" '"' '(' '+' '-' '\' 'abs' 'b' 'new' 'not' 'null' 'o' 'others' 'x' DIGIT LOWER_CASE_LETTER UPPER_CASE_LETTER
component_configuration	'for'
component_declaration	'component'
component_instantiation_statement	'\' LOWER_CASE_LETTER UPPER_CASE_LETTER
component_specification	'\' 'all' 'others' LOWER_CASE_LETTER UPPER_CASE_LETTER
composite_type_definition	'array' 'record'
concurrent_assertion_statement	'\' 'assert' 'postponed' LOWER_CASE_LETTER UPPER_CASE_LETTER
concurrent_procedure_call_statement	'"' '\' 'postponed' LOWER_CASE_LETTER UPPER_CASE_LETTER
concurrent_signal_assignment_statement	'"' '(' '\' 'postponed' 'with' LOWER_CASE_LETTER UPPER_CASE_LETTER
concurrent_statement	'"' '(' '\' 'assert' 'postponed' 'process' 'with' LOWER_CASE_LETTER UPPER_CASE_LETTER
condition	"'" '"' '(' '+' '-' '\' 'abs' 'b' 'new' 'not' 'null' 'o' 'x' DIGIT LOWER_CASE_LETTER UPPER_CASE_LETTER
condition_clause	'until'
conditional_signal_assignment	'"' '(' '\' LOWER_CASE_LETTER UPPER_CASE_LETTER
conditional_waveforms	"'" '"' '(' '+' '-' '\' 'abs' 'b' 'new' 'not' 'null' 'o' 'unaffected' 'x' DIGIT LOWER_CASE_LETTER UPPER_CASE_LETTER
configuration_declaration	'configuration'
configuration_declarative_item	'attribute' 'group' 'use'
configuration_declarative_part	ø 'attribute' 'group' 'use'
configuration_item	'for'
configuration_specification	'for'
constant_declaration	'constant'
constrained_array_definition	'array'
constraint	'(' 'range'
context_clause	ø 'library' 'use'
context_item	'library' 'use'
decimal_literal	DIGIT
declaration	'\' 'alias' 'attribute' 'component' 'configuration' 'constant' 'entity' 'file' 'function' 'group' 'impure' 'package' 'procedure' 'pure' 'shared' 'signal' 'subtype' 'type' 'variable' LOWER_CASE_LETTER UPPER_CASE_LETTER
delay_mechanism	'inertial' 'reject' 'transport'
design_file	'architecture' 'configuration' 'entity' 'library' 'package' 'use'
design_unit	'architecture' 'configuration' 'entity' 'library' 'package' 'use'
designator	'"' '\' LOWER_CASE_LETTER UPPER_CASE_LETTER
direction	'downto' 'to'
disconnection_specification	'disconnect'
discrete_range	"'" '"' '(' '+' '-' '\' 'abs' 'b' 'new' 'not' 'null' 'o' 'x' DIGIT LOWER_CASE_LETTER UPPER_CASE_LETTER
element_association	"'" '"' '(' '+' '-' '\' 'abs' 'b' 'new' 'not' 'null' 'o' 'others' 'x' DIGIT LOWER_CASE_LETTER UPPER_CASE_LETTER
element_declaration	'\' LOWER_CASE_LETTER UPPER_CASE_LETTER
element_subtype_definition	'"' '\' LOWER_CASE_LETTER UPPER_CASE_LETTER
entity_aspect	'configuration' 'entity' 'open'
entity_class	'architecture' 'component' 'configuration' 'constant' 'entity' 'file' 'function' 'group' 'label' 'literal' 'package' 'procedure' 'signal' 'subtype' 'type' 'units' 'variable'
entity_class_entry	'architecture' 'component' 'configuration' 'constant' 'entity' 'file' 'function' 'group' 'label' 'literal' 'package' 'procedure' 'signal' 'subtype' 'type' 'units' 'variable'
entity_class_entry_list	'architecture' 'component' 'configuration' 'constant' 'entity' 'file' 'function' 'group' 'label' 'literal' 'package' 'procedure' 'signal' 'subtype' 'type' 'units' 'variable'
entity_declaration	'entity'
entity_declarative_item	'alias' 'attribute' 'constant' 'disconnect' 'file' 'function' 'group' 'impure' 'procedure' 'pure' 'shared' 'signal' 'subtype' 'type' 'use' 'variable'
entity_declarative_part	ø 'alias' 'attribute' 'constant' 'disconnect' 'file' 'function' 'group' 'impure' 'procedure' 'pure' 'shared' 'signal' 'subtype' 'type' 'use' 'variable'
entity_designator	"'" '"' '\' LOWER_CASE_LETTER UPPER_CASE_LETTER
entity_header	ø 'generic' 'port'
entity_name_list	"'" '"' '\' 'all' 'others' LOWER_CASE_LETTER UPPER_CASE_LETTER
entity_specification	"'" '"' '\' 'all' 'others' LOWER_CASE_LETTER UPPER_CASE_LETTER
entity_statement	'"' '\' 'assert' 'postponed' 'process' LOWER_CASE_LETTER UPPER_CASE_LETTER
entity_statement_part	ø '"' '\' 'assert' 'postponed' 'process' LOWER_CASE_LETTER UPPER_CASE_LETTER
entity_tag	"'" '"' '\' LOWER_CASE_LETTER UPPER_CASE_LETTER
enumeration_literal	"'" '\' LOWER_CASE_LETTER UPPER_CASE_LETTER
enumeration_type_definition	'('
exit_statement	'\' 'exit' LOWER_CASE_LETTER UPPER_CASE_LETTER
exponent	'e'
expression	"'" '"' '(' '+' '-' '\' 'abs' 'b' 'new' 'not' 'null' 'o' 'x' DIGIT LOWER_CASE_LETTER UPPER_CASE_LETTER
extended_digit	DIGIT LOWER_CASE_LETTER UPPER_CASE_LETTER
extended_identifier	'\'
factor	"'" '"' '(' '\' 'abs' 'b' 'new' 'not' 'null' 'o' 'x' DIGIT LOWER_CASE_LETTER UPPER_CASE_LETTER
file_declaration	'file'
file_logical_name	"'" '"' '(' '+' '-' '\' 'abs' 'b' 'new' 'not' 'null' 'o' 'x' DIGIT LOWER_CASE_LETTER UPPER_CASE_LETTER
file_open_information	'is' 'open'
file_type_definition	'file'
floating_type_definition	'range'
formal_designator	'"' '\' LOWER_CASE_LETTER UPPER_CASE_LETTER
formal_parameter_list	'\' 'constant' 'file' 'signal' 'variable' LOWER_CASE_LETTER UPPER_CASE_LETTER
formal_part	'"' '\' LOWER_CASE_LETTER UPPER_CASE_LETTER
full_type_declaration	'type'
function_call	'"' '\' LOWER_CASE_LETTER UPPER_CASE_LETTER
generate_statement	'\' LOWER_CASE_LETTER UPPER_CASE_LETTER
generation_scheme	'for' 'if'
generic_clause	'generic'
generic_list	'\' 'constant' 'file' 'signal' 'variable' LOWER_CASE_LETTER UPPER_CASE_LETTER
generic_map_aspect	'generic'
graphic_character	DIGIT LOWER_CASE_LETTER OTHER_SPECIAL_CHARACTER SPACE_CHARACTER SPECIAL_CHARACTER UPPER_CASE_CHARACTER
group_constituent	"'" '"' '\' LOWER_CASE_LETTER UPPER_CASE_LETTER
group_constituent_list	"'" '"' '\' LOWER_CASE_LETTER UPPER_CASE_LETTER
group_declaration	'group'
group_template_declaration	'group'
guarded_signal_specification	'"' '\' 'all' 'others' LOWER_CASE_LETTER UPPER_CASE_LETTER
identifier	'\' LOWER_CASE_LETTER UPPER_CASE_LETTER
identifier_list	'\' LOWER_CASE_LETTER UPPER_CASE_LETTER
if_statement	'\' 'if' LOWER_CASE_LETTER UPPER_CASE_LETTER
incomplete_type_declaration	'type'
index_constraint	'('
index_specification	"'" '"' '(' '+' '-' '\' 'abs' 'b' 'new' 'not' 'null' 'o' 'x' DIGIT LOWER_CASE_LETTER UPPER_CASE_LETTER
index_subtype_definition	'"' '\' LOWER_CASE_LETTER UPPER_CASE_LETTER
indexed_name	'"' '\' LOWER_CASE_LETTER UPPER_CASE_LETTER
instantiated_unit	'"' '\' 'component' 'configuration' 'entity' LOWER_CASE_LETTER UPPER_CASE_LETTER
instantiation_list	'\' 'all' 'others' LOWER_CASE_LETTER UPPER_CASE_LETTER
integer	DIGIT
integer_type_definition	'range'
interface_constant_declaration	'\' 'constant' LOWER_CASE_LETTER UPPER_CASE_LETTER
interface_declaration	'\' 'constant' 'file' 'signal' 'variable' LOWER_CASE_LETTER UPPER_CASE_LETTER
interface_element	'\' 'constant' 'file' 'signal' 'variable' LOWER_CASE_LETTER UPPER_CASE_LETTER
interface_file_declaration	'file'
interface_list	'\' 'constant' 'file' 'signal' 'variable' LOWER_CASE_LETTER UPPER_CASE_LETTER
interface_signal_declaration	'\' 'signal' LOWER_CASE_LETTER UPPER_CASE_LETTER
interface_variable_declaration	'\' 'variable' LOWER_CASE_LETTER UPPER_CASE_LETTER
iteration_scheme	'for' 'while'
label	'\' LOWER_CASE_LETTER UPPER_CASE_LETTER
letter	LOWER_CASE_LETTER UPPER_CASE_LETTER
letter_or_digit	DIGIT LOWER_CASE_LETTER UPPER_CASE_LETTER
library_clause	'library'
library_unit	'architecture' 'configuration' 'entity' 'package'
literal	"'" '"' '\' 'b' 'null' 'o' 'x' DIGIT LOWER_CASE_LETTER UPPER_CASE_LETTER
logical_name	'\' LOWER_CASE_LETTER UPPER_CASE_LETTER
logical_name_list	'\' LOWER_CASE_LETTER UPPER_CASE_LETTER
logical_operator	'and' 'nand' 'nor' 'or' 'xnor' 'xor'
loop_statement	'\' 'for' 'loop' 'while' LOWER_CASE_LETTER UPPER_CASE_LETTER
miscellaneous_operator	'**' 'abs' 'not'
mode	'buffer' 'in' 'inout' 'linkage' 'out'
multiplying_operator	'*' '/' 'mod' 'rem'
name	'"' '\' LOWER_CASE_LETTER UPPER_CASE_LETTER
next_statement	'\' 'next' LOWER_CASE_LETTER UPPER_CASE_LETTER
null_statement	'\' 'null' LOWER_CASE_LETTER UPPER_CASE_LETTER
numeric_literal	'"' '\' DIGIT LOWER_CASE_LETTER UPPER_CASE_LETTER
object_declaration	'constant' 'file' 'shared' 'signal' 'variable'
operator_symbol	'"'
options	ø 'guarded' 'inertial' 'reject' 'transport'
package_body	'package'
package_body_declarative_item	'alias' 'constant' 'file' 'function' 'group' 'impure' 'procedure' 'pure' 'shared' 'subtype' 'type' 'use' 'variable'
package_body_declarative_part	ø 'alias' 'constant' 'file' 'function' 'group' 'impure' 'procedure' 'pure' 'shared' 'subtype' 'type' 'use' 'variable'
package_declaration	'package'
package_declarative_item	'alias' 'attribute' 'component' 'constant' 'disconnect' 'file' 'function' 'group' 'impure' 'procedure' 'pure' 'shared' 'signal' 'subtype' 'type' 'use' 'variable'
package_declarative_part	ø 'alias' 'attribute' 'component' 'constant' 'disconnect' 'file' 'function' 'group' 'impure' 'procedure' 'pure' 'shared' 'signal' 'subtype' 'type' 'use' 'variable'
parameter_specification	'\' LOWER_CASE_LETTER UPPER_CASE_LETTER
physical_literal	'"' '\' DIGIT LOWER_CASE_LETTER UPPER_CASE_LETTER
physical_type_definition	'range'
port_clause	'port'
port_list	'\' 'constant' 'file' 'signal' 'variable' LOWER_CASE_LETTER UPPER_CASE_LETTER
port_map_aspect	'port'
prefix	'"' '\' LOWER_CASE_LETTER UPPER_CASE_LETTER
primary	"'" '"' '(' '\' 'b' 'new' 'null' 'o' 'x' DIGIT LOWER_CASE_LETTER UPPER_CASE_LETTER
primary_unit	'configuration' 'entity' 'package'
primary_unit_declaration	'\' LOWER_CASE_LETTER UPPER_CASE_LETTER
procedure_call	'"' '\' LOWER_CASE_LETTER UPPER_CASE_LETTER
procedure_call_statement	'"' '\' LOWER_CASE_LETTER UPPER_CASE_LETTER
process_declarative_item	'alias' 'attribute' 'constant' 'file' 'function' 'group' 'impure' 'procedure' 'pure' 'shared' 'subtype' 'type' 'use' 'variable'
process_declarative_part	ø 'alias' 'attribute' 'constant' 'file' 'function' 'group' 'impure' 'procedure' 'pure' 'shared' 'subtype' 'type' 'use' 'variable'
process_statement	'\' 'postponed' 'process' LOWER_CASE_LETTER UPPER_CASE_LETTER
process_statement_part	ø '"' '(' '\' 'assert' 'case' 'exit' 'for' 'if' 'loop' 'next' 'null' 'report' 'return' 'wait' 'while' LOWER_CASE_LETTER UPPER_CASE_LETTER
qualified_expression	'"' '\' LOWER_CASE_LETTER UPPER_CASE_LETTER
range	"'" '"' '(' '+' '-' '\' 'abs' 'b' 'new' 'not' 'null' 'o' 'x' DIGIT LOWER_CASE_LETTER UPPER_CASE_LETTER
range_constraint	'range'
record_type_definition	'record'
relation	"'" '"' '(' '+' '-' '\' 'abs' 'b' 'new' 'not' 'null' 'o' 'x' DIGIT LOWER_CASE_LETTER UPPER_CASE_LETTER
relational_operator	'/=' '<' '<=' '=' '>' '>='
report_statement	'\' 'report' LOWER_CASE_LETTER UPPER_CASE_LETTER
return_statement	'\' 'return' LOWER_CASE_LETTER UPPER_CASE_LETTER
scalar_type_definition	'(' 'range'
secondary_unit	'architecture' 'package'
secondary_unit_declaration	'\' LOWER_CASE_LETTER UPPER_CASE_LETTER
selected_name	'"' '\' LOWER_CASE_LETTER UPPER_CASE_LETTER
selected_signal_assignment	'with'
selected_waveforms	"'" '"' '(' '+' '-' '\' 'abs' 'b' 'new' 'not' 'null' 'o' 'unaffected' 'x' DIGIT LOWER_CASE_LETTER UPPER_CASE_LETTER
sensitivity_clause	'on'
sensitivity_list	'"' '\' LOWER_CASE_LETTER UPPER_CASE_LETTER
sequence_of_statements	ø '"' '(' '\' 'assert' 'case' 'exit' 'for' 'if' 'loop' 'next' 'null' 'report' 'return' 'wait' 'while' LOWER_CASE_LETTER UPPER_CASE_LETTER
sequential_statement	'"' '(' '\' 'assert' 'case' 'exit' 'for' 'if' 'loop' 'next' 'null' 'report' 'return' 'wait' 'while' LOWER_CASE_LETTER UPPER_CASE_LETTER
shift_expression	"'" '"' '(' '+' '-' '\' 'abs' 'b' 'new' 'not' 'null' 'o' 'x' DIGIT LOWER_CASE_LETTER UPPER_CASE_LETTER
shift_operator	'rol' 'ror' 'sla' 'sll' 'sra' 'srl'
sign	'+' '-'
signal_assignment_statement	'"' '(' '\' LOWER_CASE_LETTER UPPER_CASE_LETTER
signal_declaration	'signal'
signal_kind	'bus' 'register'
signal_list	'"' '\' 'all' 'others' LOWER_CASE_LETTER UPPER_CASE_LETTER
signature	'['
simple_expression	"'" '"' '(' '+' '-' '\' 'abs' 'b' 'new' 'not' 'null' 'o' 'x' DIGIT LOWER_CASE_LETTER UPPER_CASE_LETTER
simple_name	'\' LOWER_CASE_LETTER UPPER_CASE_LETTER
slice_name	'"' '\' LOWER_CASE_LETTER UPPER_CASE_LETTER
string_literal	'"'
subprogram_body	'function' 'impure' 'procedure' 'pure'
subprogram_declaration	'function' 'impure' 'procedure' 'pure'
subprogram_declarative_item	'alias' 'attribute' 'constant' 'file' 'function' 'group' 'impure' 'procedure' 'pure' 'shared' 'subtype' 'type' 'use' 'variable'
subprogram_declarative_part	ø 'alias' 'attribute' 'constant' 'file' 'function' 'group' 'impure' 'procedure' 'pure' 'shared' 'subtype' 'type' 'use' 'variable'
subprogram_kind	'function' 'procedure'
subprogram_specification	'function' 'impure' 'procedure' 'pure'
subprogram_statement_part	ø '"' '(' '\' 'assert' 'case' 'exit' 'for' 'if' 'loop' 'next' 'null' 'report' 'return' 'wait' 'while' LOWER_CASE_LETTER UPPER_CASE_LETTER
subtype_declaration	'subtype'
subtype_indication	'"' '\' LOWER_CASE_LETTER UPPER_CASE_LETTER
suffix	"'" '"' '\' 'all' LOWER_CASE_LETTER UPPER_CASE_LETTER
target	'"' '(' '\' LOWER_CASE_LETTER UPPER_CASE_LETTER
term	"'" '"' '(' '\' 'abs' 'b' 'new' 'not' 'null' 'o' 'x' DIGIT LOWER_CASE_LETTER UPPER_CASE_LETTER
timeout_clause	'for'
type_conversion	'"' '\' LOWER_CASE_LETTER UPPER_CASE_LETTER
type_declaration	'type'
type_definition	'(' 'access' 'array' 'file' 'range' 'record'
type_mark	'"' '\' LOWER_CASE_LETTER UPPER_CASE_LETTER
unconstrained_array_definition	'array'
use_clause	'use'
variable_assignment_statement	'"' '(' '\' LOWER_CASE_LETTER UPPER_CASE_LETTER
variable_declaration	'shared' 'variable'
vhdl	'architecture' 'configuration' 'entity' 'library' 'package' 'use'
wait_statement	'\' 'wait' LOWER_CASE_LETTER UPPER_CASE_LETTER
waveform	"'" '"' '(' '+' '-' '\' 'abs' 'b' 'new' 'not' 'null' 'o' 'unaffected' 'x' DIGIT LOWER_CASE_LETTER UPPER_CASE_LETTER
waveform_element	"'" '"' '(' '+' '-' '\' 'abs' 'b' 'new' 'not' 'null' 'o' 'x' DIGIT LOWER_CASE_LETTER UPPER_CASE_LETTER