EDK II VFR Specification
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EDK II VFR Specification
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EDK II VFR Programming Language Specification
1 Introduction
2 VFR Description in BNF
2.1 VFR Programming Keywords
2.2 VFR Program
2.3 VFR Data Struct Definition
2.4 VFR FormSet Definition
2.5 VFR FormSet List Definition
2.6 VFR Default Stores Definition
2.7 VFR Variable Store Definition
2.8 VFR FormSet DisableIf Definition
2.9 VFR FormSet SuppressIf Definition
2.10 VFR General Token Definition
2.11 VFR Form Definition
2.12 VFR Expression Statement Definition
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2.5 VFR FormSet List Definition
1
vfrFormSetList ::=
2
(
3
vfrFormDefinition
4
| vfrFormMapDefinition
5
| vfrStatementImage
6
| vfrStatementVarStoreLinear
7
| vfrStatementVarStoreEfi
8
| vfrStatementVarStoreNameValue
9
| vfrStatementDefaultStore
10
| vfrStatementDisableIfFormSet
11
| vfrStatementSuppressIfFormSet
12
| vfrStatementExtension
13
)*
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BEHAVIORS AND RESTRICTIONS

In the formset, there can be more than one form of variable stores and default stores. The formset can control whether to process an individual form by nesting it inside of an EFI_IFR_DISABLE_IF expression.
The variable stores and default stores must be defined before being referenced.

Example

None.
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2.4 VFR FormSet Definition
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2.6 VFR Default Stores Definition
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Contents
BEHAVIORS AND RESTRICTIONS
Example