<p><b>B.110 group:</b>  A named collection of named entities.  Groups relate different named entities for the purposes not specified by the language.  In particular, groups may be decorated with attributes.  (&#167;  <a href = "1076_4.HTM#4.6"> 4.6 </a>  , &#167;  <a href = "1076_4.HTM#4.7"> 4.7 </a>  )
<p><b>B.111 guard:</b>  <i>See</i> <b>guard expression</b>.
<p><b>B.112 guard expression:</b>  A Boolean-valued expression associated with a block statement that controls assignments to guarded signals within the block.  A guard expression defines an implicit signal GUARD that may be used to control the operation of certain statements within the block.  (<i></i><i>&#167;</i>  <a href = "1076_4.HTM#4.3.1.2"> 4.3.1.2 </a>  <i>,</i> &#167;  <a href = "1076_9.HTM#9.1"> 9.1 </a>  , &#167;  <a href = "1076_9.HTM#9.5"> 9.5 </a>  )
<p><b>B.113 guarded assignment:</b>  A concurrent signal assignment statement that includes the option <b>guarded</b>, which specifies that the signal assignment statement is executed when a signal GUARD changes from FALSE to TRUE, or when that signal has been TRUE and an event occurs on one of the signals referenced in the corresponding GUARD expression.  The signal GUARD may be one of the implicitly declared GUARD signals associated with block statements that have guard expressions, or it may be an explicitly declared signal of type Boolean that is visible at the point of the concurrent signal assignment statement.(&#167;  <a href = "1076_9.HTM#9.5"> 9.5 </a>  )
<p><b>B.114 guarded signal:</b> A signal declared as a register or a bus.  Such signals have special semantics when their drivers are updated from within guarded signal assignment statements.  (&#167;  <a href = "1076_4.HTM#4.3.1.2"> 4.3.1.2 </a>  )
<p><b>B.115 guarded target:</b>  A signal assignment target consisting only of guarded signals.  An unguarded target is a target consisting only of unguarded signals.  (&#167;  <a href = "1076_9.HTM#9.5"> 9.5 </a>  )
<p><b>B.116 hidden:</b>  A declaration that is not directly visible.  A declaration may be <i>hidden</i> in its scope by a homograph of the declaration.   (&#167;  <a href = "1076_10.HTM#10.3"> 10.3 </a>  )
<p><b>B.117 homograph:</b>  A reflexive property of two declarations.  Each of two declarations is said to be a <i>homograph</i> of the other if both declarations have the same identifier and overloading is allowed for at most one of the two.  If overloading is allowed for both declarations, then each of the two is a homograph of the other if they have the same identifier, operator symbol, or character literal, as well as the same parameter and result type profile.(&#167;  <a href = "1076_1.HTM#1.3.1"> 1.3.1 </a>  , <i>&#167;</i><i>  <a href = "1076_10.HTM#10.3"> 10.3 </a>  </i>)
<p><b>B.118 identify:</b>  A property of a name appearing in an element association of an assignment target in the form of an aggregate. The name is said to <i>identify</i> a signal or variable and any subelements of that signal or variable.  (&#167;  <a href = "1076_8.HTM#8.4"> 8.4 </a>  , &#167;<i>  <a href = "1076_8.HTM#8.5"> 8.5 </a>  </i>)
<p><b>B.119 immediate scope:</b>  A property of a declaration with respect to the declarative region within which the declaration immediately occurs.  The immediate scope of the declaration extends from the beginning of the declaration to the end of the declarative region.  (&#167;  <a href = "1076_10.HTM#10.2"> 10.2 </a>  )
<p><b>B.120 immediately within:</b>  A property of a declaration with respect to some declarative region.  A declaration is said to occur <i>immediately within</i> a declarative region if this region is the innermost region that encloses the declaration, not counting the declarative region (if any)associated with the declaration itself.  (&#167;  <a href = "1076_10.HTM#10.1"> 10.1 </a>  )
<p><b>B.121 implicit signal:</b> Any signal S'Stable(T), S'Quiet(T), S'Delayed, or S'Transaction, or any implicit GUARD signal. <b> </b>A slice or subelement (or slice thereof) of an implicit signal is also an implicit signal.(&#167;  <a href = "1076_12.HTM#12.6.2"> 12.6.2 </a>  , &#167;  <a href = "1076_12.HTM#12.6.3"> 12.6.3 </a>  , &#167;  <a href = "1076_12.HTM#12.6.4"> 12.6.4 </a>  )
<p><b>B.122 implicitly declared object: </b>An object whose declaration is not explicit in the source description, but is a consequence of other constructs; for example, signal GUARD.  (<i>&#167;</i>  <a href = "1076_4.HTM#4.3"> 4.3 </a>  , &#167;  <a href = "1076_9.HTM#9.1"> 9.1 </a>  , &#167;  <a href = "1076_14.HTM#14.1"> 14.1 </a>  )  <i>See also </i><b>declared object</b>.
<p><b>B.123 imply:</b>  A property of a binding indication in a configuration specification with respect to the design entity indicated by the binding specification. The binding indication is said to <i>imply</i> the design entity; the design entity maybe indicated directly, indirectly, or by default.<b>  </b>(&#167;  <a href = "1076_5.HTM#5.2.1.1"> 5.2.1.1 </a>  )
<p><b>B.124 impure function:</b> A function that may return a different value each time it is called, even when different calls have the same actual parameter values.  A pure function returns the same value each time it is called using the same values as actual parameters.  An impure function can update objects outside of its scope and can access a broader class of values than a pure function.  (&#167;2)
<p><b>B.125 incomplete type declaration:</b>  A type declaration that is used to define mutually dependent and recursive access types.  (&#167;  <a href = "1076_3.HTM#3.3.1"> 3.3.1 </a>  )
<p><b>B.126 index constraint:</b>  A constraint that determines the index range for every index of an array type, and thereby the bounds of the array.  An index constraint is <i>compatible</i> with an array type if and only if the constraint defined by each discrete range in the index constraint is compatible with the corresponding index subtype in the array type.  An array value <i>satisfies</i> an index constraint if the array value and the index constraint have the same index range at each index position .  (&#167;  <a href = "1076_3.HTM#3.1"> 3.1 </a>  , <i>&#167;</i>  <a href = "1076_3.HTM#3.2.1.1"> 3.2.1.1 </a>  )
<p><b>B.127 index range:</b>  A multidimensional array has a distinct element for each possible sequence of index values that can be formed by selecting one value for each index (in the given order).  The possible values for a given index are all the values that belong to the corresponding range.  This range of values is called the <i>index range</i>.  (&#167;  <a href = "1076_3.HTM#3.2.1"> 3.2.1 </a>  )
<p><b>B.128 index subtype:</b>  For a given index position of an array, the <i>index subtype</i> is denoted by the type mark of the corresponding index subtype definition.  (&#167;  <a href = "1076_3.HTM#3.2.1"> 3.2.1 </a>  )
<p><b>B.129 inertial delay: </b> A delay model used for switching circuits; a pulse whose duration is shorter than the switching time of the circuit will not be transmitted.  Inertial delay is the default delay mode for signal assignment statements.  (&#167;  <a href = "1076_8.HTM#8.4"> 8.4 </a>  )  <i>See also</i> <b>transport delay</b>.
<p><b>B.130 initial value expression:</b>  An expression that specifies the initial value to be assigned to a variable.  (&#167;  <a href = "1076_4.HTM#4.3.1.3"> 4.3.1.3 </a>  )
<p><b>B.131 inputs:</b>  The signals identified by the longest static prefix of each signal name appearing as a primary in each expression (other than time expressions) within a concurrent signal assignment statement.  (&#167;  <a href = "1076_9.HTM#9.5"> 9.5 </a>  )
<p><b>B.132 instance: </b> A subcomponent of a design entity whose prototype is a component declaration, design entity, or configuration declaration.  Each instance of a component may have different actuals associated with its local ports and generics.  A component instantiation statement whose instantiated unit denotes a component creates an instance of the corresponding component.  A component instantiation statement whose instantiated unit denotes either a design entity or a configuration declaration creates an instance of the denoted design entity.  (&#167;  <a href = "1076_9.HTM#9.6"> 9.6 </a>  , &#167;  <a href = "1076_9.HTM#9.6.1"> 9.6.1 </a>  , &#167;  <a href = "1076_9.HTM#9.6.2"> 9.6.2 </a>  )
<p><b>B.133 integer literal:</b>  An abstract literal of the type <i>universal_integer</i> that does not contain a base point.(&#167;  <a href = "1076_13.HTM#13.4"> 13.4 </a>  )
<p><b>B.134 integer type:</b>  A discrete scalar type whose values represent integer numbers within a specified range. <b> </b>(<i>&#167;</i>  <a href = "1076_3.HTM#3.1"> 3.1 </a>  , &#167;  <a href = "1076_3.HTM#3.1.2"> 3.1.2 </a>  )
<p><b>B.135 interface list:</b>  A list that declares the interface objects required by a subprogram, component, design entity, or block statement.(&#167;  <a href = "1076_4.HTM#4.3.2.1"> 4.3.2.1 </a>  )
<p><b>B.136 internal block: </b> A nested block in a design unit, as defined by a block statement.  (&#167;1)
<p><b>B.137 ISO:</b>  The International Organization for Standardization.
<p><b>B.138 ISO 8859-1:</b>  The ISO Latin-1 character set.  Package Standard contains the definition of type Character, which represents the ISO Latin-1character set.  (&#167;  <a href = "1076_3.HTM#3.1.1"> 3.1.1 </a>  , &#167;  <a href = "1076_14.HTM#14.2"> 14.2 </a>  )
<p><b>B.139 kernel process:</b>  A conceptual representation of the agent that coordinates the activity of user-defined processes during a simulation.  The kernel process causes the execution of I/O operations, the propagation of signal values, and the updating of values of implicit signals [such as S'Stable(T)]; in addition, it detects events that occur and causes the appropriate processes to execute in response to those events.  (&#167;  <a href = "1076_12.HTM#12.6"> 12.6 </a>  )
<p><b>B.140 left of:</b>  When both a value V1 and a value V2 belong to a range and either the range is an ascending range and V2 is the successor of V1, or the range is a descending range and V2 is the predecessor of V1.  (&#167;  <a href = "1076_3.HTM#3.1"> 3.1 </a>  )
<p><b>B.141 left-to-right order:</b> When each value in a list of values is to the left of the next value in the list within that range, except for the last value in the list.  (&#167;  <a href = "1076_3.HTM#3.1"> 3.1 </a>  )
<p><b>B.142 library:</b>  <i>See </i><b>design library</b>.
<p><b>B.143 library unit:</b>  The representation in a design library of an analyzed design unit.  (&#167;  <a href = "1076_11.HTM#11.1"> 11.1 </a>  )
<p><b>B.144 literal:</b>  A value that is directly specified in the description of a design.  A literal can be a bit string literal, enumeration literal, numeric literal, string literal, or the literal <b>null</b>.  (&#167;  <a href = "1076_7.HTM#7.3.1"> 7.3.1 </a>  )
<p><b>B.145 local generic:</b>  An interface object declared in a component declaration that serves to connect a formal generic in the interface list of an entity and an actual generic or value in the design unit instantiating that entity.  (&#167;  <a href = "1076_4.HTM#4.3"> 4.3 </a>  , &#167;  <a href = "1076_4.HTM#4.3.2.2"> 4.3.2.2 </a>  , &#167;  <a href = "1076_4.HTM#4.5"> 4.5 </a>  )
<p>
<p><b>B.146 local port:</b>  A signal declared in the interface list of a component declaration that serves to connect a formal port in the interface list of an entity and an actual port or signal in the design unit instantiating that entity.  (&#167;  <a href = "1076_4.HTM#4.3"> 4.3 </a>  , &#167;  <a href = "1076_4.HTM#4.3.2.2"> 4.3.2.2 </a>  , &#167;  <a href = "1076_4.HTM#4.5"> 4.5 </a>  )
<p><b>B.147 locally static expression:</b>  An expression that can be evaluated during the analysis of the design unit in which it appears.  (<i>&#167;</i><i>  <a href = "1076_7.HTM#7.4"> 7.4 </a>  </i>, &#167;  <a href = "1076_7.HTM#7.4.1"> 7.4.1 </a>  )
<p><b>B.148 locally static name:</b>  A name in which every expression is locally static (if every discrete range that appears as part of the name denotes a locally static range or subtype and if no prefix within the name is either an object or value of an access type or a function call).  (&#167;  <a href = "1076_6.HTM#6.1"> 6.1 </a>  )
<p><b>B.149 locally static primary:</b>  One of a certain group of primaries that includes literals, certain constants, and certain attributes.  (&#167;  <a href = "1076_7.HTM#7.4"> 7.4 </a>  )
<p><b>B.150 locally static subtype:</b>  A subtype whose bounds and direction can be determined during the analysis of the design unit in which it appears.(&#167;  <a href = "1076_7.HTM#7.4.1"> 7.4.1 </a>  )
<p><b>B.151 longest static prefix:</b>  The name of a signal or a variable name,if the name is a static signal or variable name.  Otherwise, the longest static prefix is the longest prefix of the name that is a static signal or variable name.  (&#167;  <a href = "1076_6.HTM#6.1"> 6.1 </a>  )  <i>See also</i> <b>static signal name</b>.
<p><b>B.152 loop parameter:</b>  A constant, implicitly declared by the for clause of a loop statement, used to count the number of iterations of a loop.(&#167;  <a href = "1076_8.HTM#8.9"> 8.9 </a>  )
<p><b>B.153 lower bound:</b>  For a range L <b>to</b> R or L <b>downto</b> R, the smaller of L and R.  (&#167;  <a href = "1076_3.HTM#3.1"> 3.1 </a>  )
<p><b>B.154 match:</b>  A property of a signature with respect to the parameter and subtype profile of a subprogram or enumeration literal. The signature is said to <i>match</i> the parameter and result type profile if certain conditions are true.  (&#167;  <a href = "1076_2.HTM#2.3.2"> 2.3.2 </a>  )
<p><b>B.155 matching elements:</b>  Corresponding elements of two composite type values that are used for certain logical and relational operations.(&#167;  <a href = "1076_7.HTM#7.2.3"> 7.2.3 </a>  )
<p><b>B.156 member:</b> A slice of an object, a subelement, or an object; or a slice of a subelement of an object.  (&#167;  <a href = "1076_3.HTM"> 3 </a>  )                                                                                                          
<p><b>B.157 mode:</b>  The direction of information flow through the port or parameter.  Modes are <b>in</b>, <b>out</b>, <b>inout</b>, <b>buffer</b>, or <b>linkage</b>.  (&#167;  <a href = "1076_4.HTM#4.3.2"> 4.3.2 </a>  )
<p><b>B.158 model:</b>  The result of the elaboration of a design hierarchy.  The <i>model</i> can be executed in order to simulate the design it represents.(&#167;12, &#167;  <a href = "1076_12.HTM#12.6"> 12.6 </a>  )
<p><b>B.159 name:</b>  A property of an identifier with respect to some named entity.  Each form of declaration associates an identifier with a named entity. In certain places within the scope of a declaration, it is valid to use the identifier to refer to the associated named entity; these places are defined by the visibility rules.  At such places, the identifier is said to be the <i>name</i> of the named entity.  (<i>&#167;</i>4, &#167;  <a href = "1076_6.HTM#6.1"> 6.1 </a>  )