| XPath2 | ::= | QueryList <EOF> |
| QueryList | ::= | Module ( <QuerySeparator> ( Module )? )* |
| Module | ::= | ( VersionDecl )? ( MainModule | LibraryModule ) |
| MainModule | ::= | Prolog QueryBody |
| LibraryModule | ::= | ModuleDecl Prolog |
| ModuleDecl | ::= | <ModuleNamespace> <NCNameForPrefix> <AssignEquals> <URLLiteral> Separator |
| Prolog | ::= | ( ( NamespaceDecl | XMLSpaceDecl | DefaultNamespaceDecl | DefaultCollationDecl | BaseURIDecl | SchemaImport | ModuleImport | VarDecl | ValidationDecl | FunctionDecl ) Separator )* |
| Separator | ::= | <SemiColon> |
| VersionDecl | ::= | <VersionStringLiteral> Separator |
| ModuleImport | ::= | <ImportModuleToken> ( <Namespace> <NCNameForPrefix> <AssignEquals> )? <URLLiteral> ( <AtStringLiteral> )? |
| VarDecl | ::= | <DefineVariable> <VarName> ( TypeDeclaration )? ( ( <LbraceExprEnclosure> Expr <Rbrace> ) | <External> ) |
| QueryBody | ::= | Expr |
| Expr | ::= | ExprSingle ( <Comma> ExprSingle )* |
| ExprSingle | ::= | ( FLWORExpr | QuantifiedExpr | TypeswitchExpr | IfExpr | OrExpr ) |
| FLWORExpr | ::= | ( ( ( ForClause | LetClause ) )+ ( WhereClause )? ( OrderByClause )? <Return> ExprSingle ) |
| ForClause | ::= | <ForVariable> <VarName> ( TypeDeclaration )? ( PositionalVar )? <In> ExprSingle ( <Comma> ( <VariableIndicator> <VarName> ( TypeDeclaration )? ( PositionalVar )? ) <In> ExprSingle )* |
| PositionalVar | ::= | <AtWord> <VariableIndicator> <VarName> |
| LetClause | ::= | <LetVariable> <VarName> ( TypeDeclaration )? <ColonEquals> ExprSingle ( <Comma> ( <VariableIndicator> <VarName> ( TypeDeclaration )? ) <ColonEquals> ExprSingle )* |
| WhereClause | ::= | <Where> Expr |
| OrderByClause | ::= | ( <OrderBy> | <OrderByStable> ) OrderSpecList |
| OrderSpecList | ::= | OrderSpec ( <Comma> OrderSpec )* |
| OrderSpec | ::= | ExprSingle OrderModifier |
| OrderModifier | ::= | ( ( <Ascending> | <Descending> ) )? ( ( <EmptyGreatest> | <EmptyLeast> ) )? ( <Collation> <StringLiteral> )? |
| QuantifiedExpr | ::= | ( ( <Some> | <Every> ) <VarName> ( TypeDeclaration )? <In> ExprSingle ( <Comma> ( <VariableIndicator> <VarName> ( TypeDeclaration )? ) <In> ExprSingle )* <Satisfies> ExprSingle ) |
| TypeswitchExpr | ::= | ( <TypeswitchLpar> Expr <Rpar> ( CaseClause )+ <Default> ( <VariableIndicator> <VarName> )? <Return> ExprSingle ) |
| CaseClause | ::= | <Case> ( <VariableIndicator> <VarName> <As> )? SequenceType <Return> ExprSingle |
| IfExpr | ::= | ( <IfLpar> Expr <Rpar> <Then> ExprSingle <Else> ExprSingle ) |
| OperatorExpr | ::= | OrExpr |
| OrExpr | ::= | AndExpr ( <Or> AndExpr )* |
| AndExpr | ::= | InstanceofExpr ( <And> InstanceofExpr )* |
| InstanceofExpr | ::= | TreatExpr ( <Instanceof> SequenceType )? |
| TreatExpr | ::= | CastableExpr ( <TreatAs> SequenceType )? |
| CastableExpr | ::= | CastExpr ( <Castable> SingleType )? |
| CastExpr | ::= | ComparisonExpr ( <CastAs> SingleType )? |
| ComparisonExpr | ::= | RangeExpr ( ( ValueComp | GeneralComp | NodeComp ) RangeExpr )? |
| RangeExpr | ::= | AdditiveExpr ( <To> AdditiveExpr )? |
| AdditiveExpr | ::= | MultiplicativeExpr ( ( <Plus> | <Minus> ) MultiplicativeExpr )* |
| MultiplicativeExpr | ::= | UnaryExpr ( ( <Multiply> | <Div> | <Idiv> | <Mod> ) UnaryExpr )* |
| UnaryExpr | ::= | ( <UnaryMinus> | <UnaryPlus> )* UnionExpr |
| UnionExpr | ::= | IntersectExceptExpr ( ( <Union> | <Vbar> ) IntersectExceptExpr )* |
| IntersectExceptExpr | ::= | ValueExpr ( ( <Intersect> | <Except> ) ValueExpr )* |
| ValueExpr | ::= | ( ValidateExpr | PathExpr ) |
| PathExpr | ::= | ( ( <Root> ( RelativePathExpr )? ) | ( <RootDescendants> RelativePathExpr ) | RelativePathExpr ) |
| RelativePathExpr | ::= | StepExpr ( ( <Slash> | <SlashSlash> ) StepExpr )* |
| StepExpr | ::= | ( AxisStep | FilterStep ) |
| AxisStep | ::= | ( ForwardStep | ReverseStep ) Predicates |
| FilterStep | ::= | PrimaryExpr Predicates |
| ContextItemExpr | ::= | <Dot> |
| PrimaryExpr | ::= | ( Literal | VarRef | ParenthesizedExpr | ContextItemExpr | FunctionCall | Constructor ) |
| VarRef | ::= | <VariableIndicator> <VarName> |
| Predicates | ::= | ( ( ( <Lbrack> Expr <Rbrack> ) ) )* |
| ValidateExpr | ::= | ( <ValidateLbrace> | ( <ValidateGlobal> <LbraceExprEnclosure> ) | ( <ValidateContext> SchemaContextLoc <LbraceExprEnclosure> ) | ( <ValidateSchemaMode> ( SchemaContext )? <LbraceExprEnclosure> ) ) Expr <Rbrace> |
| SchemaContext | ::= | ( ( <InContextForKindTest> SchemaContextLoc ) | <Global> ) |
| Constructor | ::= | ( DirElemConstructor | ComputedConstructor | XmlComment | XmlPI | CdataSection ) |
| ComputedConstructor | ::= | ( CompElemConstructor | CompAttrConstructor | CompDocConstructor | CompTextConstructor | CompXmlPI | CompXmlComment | CompNSConstructor ) |
| GeneralComp | ::= | ( <Equals> | <NotEquals> | <Lt> | <LtEquals> | <Gt> | <GtEquals> ) |
| ValueComp | ::= | ( <FortranEq> | <FortranNe> | <FortranLt> | <FortranLe> | <FortranGt> | <FortranGe> ) |
| NodeComp | ::= | ( <Is> | <LtLt> | <GtGt> ) |
| ForwardStep | ::= | ( ( ForwardAxis NodeTest ) | AbbrevForwardStep ) |
| ReverseStep | ::= | ( ( ReverseAxis ( NodeTest ) ) | AbbrevReverseStep ) |
| AbbrevForwardStep | ::= | ( <At> )? NodeTest |
| AbbrevReverseStep | ::= | <DotDot> |
| ForwardAxis | ::= | ( <AxisChild> | <AxisDescendant> | <AxisAttribute> | <AxisSelf> | <AxisDescendantOrSelf> | <AxisFollowingSibling> | <AxisFollowing> ) |
| ReverseAxis | ::= | ( <AxisParent> | <AxisAncestor> | <AxisPrecedingSibling> | <AxisPreceding> | <AxisAncestorOrSelf> ) |
| NodeTest | ::= | ( KindTest | NameTest ) |
| NameTest | ::= | ( <QName> | Wildcard ) |
| Wildcard | ::= | ( <Star> | <NCNameColonStar> | <StarColonNCName> ) |
| Literal | ::= | ( NumericLiteral | <StringLiteral> ) |
| NumericLiteral | ::= | ( <IntegerLiteral> | <DecimalLiteral> | <DoubleLiteral> ) |
| ParenthesizedExpr | ::= | <Lpar> ( Expr )? <Rpar> |
| FunctionCall | ::= | ( <QNameLpar> ) ( ExprSingle ( <Comma> ExprSingle )* )? <Rpar> |
| DirElemConstructor | ::= | ( <StartTagOpenRoot> | <StartTagOpen> ) <TagQName> AttributeList ( <EmptyTagClose> | ( <StartTagClose> ( ElementContent )* <EndTagOpen> <TagQName> ( <S> )? <EndTagClose> ) ) |
| CompDocConstructor | ::= | ( <DocumentLbrace> Expr <Rbrace> ) |
| CompElemConstructor | ::= | ( <ElementQNameLbrace> | ( <ElementLbrace> Expr <Rbrace> <LbraceExprEnclosure> ) ) ( Expr )? <Rbrace> |
| CompNSConstructor | ::= | <NamespaceNCNameLbrace> Expr <Rbrace> |
| CompAttrConstructor | ::= | ( <AttributeQNameLbrace> | ( <AttributeLbrace> Expr <Rbrace> <LbraceExprEnclosure> ) ) ( Expr )? <Rbrace> |
| CompXmlPI | ::= | ( <PINCNameLbrace> | ( <PILbrace> Expr <Rbrace> <LbraceExprEnclosure> ) ) ( Expr )? <Rbrace> |
| CompXmlComment | ::= | <CommentLbrace> Expr <Rbrace> |
| CompTextConstructor | ::= | <TextLbrace> ( Expr )? <Rbrace> |
| CdataSection | ::= | <CdataSectionStart> ( <CDataSectionChar> )* <CdataSectionEnd> |
| XmlPI | ::= | <ProcessingInstructionStart> <PITarget> ( <PIContentChar> )* <ProcessingInstructionEnd> |
| XmlComment | ::= | <XmlCommentStart> ( <CommentContentChar> )* <XmlCommentEnd> |
| ElementContent | ::= | ( <ElementContentChar> | <LCurlyBraceEscape> | <RCurlyBraceEscape> | DirElemConstructor | EnclosedExpr | CdataSection | <CharRef> | <PredefinedEntityRef> | XmlComment | XmlPI ) |
| AttributeList | ::= | ( <S> ( <TagQName> ( <S> )? <ValueIndicator> ( <S> )? AttributeValue )? )* |
| AttributeValue | ::= | ( ( <OpenQuot> ( ( <EscapeQuot> | QuotAttrValueContent ) )* <CloseQuot> ) | ( <OpenApos> ( ( <EscapeApos> | AposAttrValueContent ) )* <CloseApos> ) ) |
| QuotAttrValueContent | ::= | ( <QuotAttContentChar> | <CharRef> | <LCurlyBraceEscape> | <RCurlyBraceEscape> | EnclosedExpr | <PredefinedEntityRef> ) |
| AposAttrValueContent | ::= | ( <AposAttContentChar> | <CharRef> | <LCurlyBraceEscape> | <RCurlyBraceEscape> | EnclosedExpr | <PredefinedEntityRef> ) |
| EnclosedExpr | ::= | ( <Lbrace> | <LbraceExprEnclosure> ) Expr <Rbrace> |
| XMLSpaceDecl | ::= | <DeclareXMLSpace> ( <XMLSpacePreserve> | <XMLSpaceStrip> ) |
| DefaultCollationDecl | ::= | <DeclareCollation> <URLLiteral> |
| BaseURIDecl | ::= | <DeclareBaseURI> <URLLiteral> |
| NamespaceDecl | ::= | <DeclareNamespace> <NCNameForPrefix> <AssignEquals> <URLLiteral> |
| DefaultNamespaceDecl | ::= | ( <DeclareDefaultElement> | <DeclareDefaultFunction> ) <Namespace> <URLLiteral> |
| FunctionDecl | ::= | <DefineFunction> <QNameLpar> ( ParamList )? ( <Rpar> | ( <RparAs> SequenceType ) ) ( EnclosedExpr | <External> ) |
| ParamList | ::= | Param ( <Comma> Param )* |
| Param | ::= | <VariableIndicator> <VarName> ( TypeDeclaration )? |
| TypeDeclaration | ::= | <As> SequenceType |
| SingleType | ::= | AtomicType ( <OccurrenceZeroOrOne> )? |
| SequenceType | ::= | ( ( ItemType ( OccurrenceIndicator )? ) | <Empty> ) |
| AtomicType | ::= | <QNameForSequenceType> |
| ItemType | ::= | ( AtomicType | KindTest | <Item> ) |
| KindTest | ::= | ( DocumentTest | ElementTest | AttributeTest | PITest | CommentTest | TextTest | AnyKindTest ) |
| ElementTest | ::= | ( <ElementType> | <ElementTypeForKindTest> | <ElementTypeForDocumentTest> ) ( ( ( SchemaContextPath ElementName ) | ( ElementNameOrWildcard ( <CommaForKindTest> TypeNameOrWildcard ( <Nillable> )? )? ) ) )? <RparForKindTest> |
| AttributeTest | ::= | ( <AttributeType> | <AttributeTypeForKindTest> ) ( ( ( SchemaContextPath AttributeName ) | ( AttribNameOrWildcard ( <CommaForKindTest> TypeNameOrWildcard )? ) ) )? <RparForKindTest> |
| ElementName | ::= | <QNameForItemType> |
| AttributeName | ::= | <QNameForItemType> |
| TypeName | ::= | <QNameForItemType> |
| ElementNameOrWildcard | ::= | ( ElementName | <AnyName> ) |
| AttribNameOrWildcard | ::= | ( AttributeName | <AnyName> ) |
| TypeNameOrWildcard | ::= | ( TypeName | <AnyName> ) |
| PITest | ::= | ( <ProcessingInstructionLpar> | <ProcessingInstructionLparForKindTest> ) ( ( <NCNameForPI> | <StringLiteralForKindTest> ) )? <RparForKindTest> |
| DocumentTest | ::= | ( <DocumentLpar> | <DocumentLparForKindTest> ) ( ElementTest )? <RparForKindTest> |
| CommentTest | ::= | ( <CommentLpar> | <CommentLparForKindTest> ) <RparForKindTest> |
| TextTest | ::= | ( <TextLpar> | <TextLparForKindTest> ) <RparForKindTest> |
| AnyKindTest | ::= | ( <NodeLpar> | <NodeLparForKindTest> ) <RparForKindTest> |
| SchemaContextPath | ::= | <SchemaGlobalContextSlash> ( <SchemaContextStepSlash> )* |
| SchemaContextLoc | ::= | ( ( ( SchemaContextPath )? <QNameForItemType> ) | <SchemaGlobalTypeName> ) |
| OccurrenceIndicator | ::= | ( <OccurrenceZeroOrOne> | <OccurrenceZeroOrMore> | <OccurrenceOneOrMore> ) |
| ValidationDecl | ::= | <DeclareValidation> <SchemaModeForDeclareValidate> |
| SchemaImport | ::= | <ImportSchemaToken> ( SchemaPrefix )? <URLLiteral> ( <AtStringLiteral> )? |
| SchemaPrefix | ::= | ( ( <Namespace> <NCNameForPrefix> <AssignEquals> ) | ( <DefaultElement> <Namespace> ) ) |