Riferimenti:Glossario XML

Questo glossario spiega i termini utilizzati negli articoli di riferimento XML. È stato generato dal foglio di stile xs3p.

Abstract

(Applicabile a definizioni di tipo complesso e dichiarazioni di elementi). Non è possibile utilizzare un elemento abstract o un tipo complesso per validare un'istanza element. Se è presente un riferimento a un elemento abstract, per validare l'istanza è possibile utilizzare esclusivamente le dichiarazioni di elementi che possono sostituire l'elemento. Per i riferimenti alle definizioni di tipo abstract è possibile utilizzare solo tipi derivati.

All Model Group

Gli elementi figli possono essere indicati in qualsiasi ordine all'interno delle istanze. Vedere: http://www.w3.org/TR/xmlschema-1/#element-all.

Choice Model Group

Nelle istanze può essere indicato solo uno tra gli elementi figli e i gruppi di modello. Vedere: http://www.w3.org/TR/xmlschema-1/#element-choice.

Collapse Whitespace Policy

Sostituisce i caratteri di tabulazione, avanzamento di riga e testo a capo con un carattere di spazio (Unicode 32), quindi trasforma sequenze di caratteri spazio contigui in un singolo carattere spazio, rimuovendo i caratteri spazio iniziali e finali.

Disallowed Substitutions

(Applicabile a dichiarazioni di elementi). If substitution is specified, then substitution group members cannot be used in place of the given element declaration to validate element instances. If derivation methods, e.g. extension, restriction, are specified, then the given element declaration will not validate element instances that have types derived from the element declaration's type using the specified derivation methods. Normally, element instances can override their declaration's type by specifying an xsi:type attribute.

Key Constraint

Like Uniqueness Constraint, but additionally requires that the specified value(s) must be provided. See: http://www.w3.org/TR/xmlschema-1/#cIdentity-constraint_Definitions.

Key Reference

Constraint Ensures that the specified value(s) must match value(s) from a Key Constraint or Uniqueness Constraint. See: http://www.w3.org/TR/xmlschema-1/#cIdentity-constraint_Definitions.

Model Group

Groups together element content, specifying the order in which the element content can occur and the number of times the group of element content may be repeated. See: http://www.w3.org/TR/xmlschema-1/#Model_Groups.

Nillable (Applicabile a dichiarazioni di elementi).

If an element declaration is nillable, instances can use the xsi:nil attribute. The xsi:nil attribute is the boolean attribute, nil, from the http://www.w3.org/2001/XMLSchema-instance namespace. If an element instance has an xsi:nil attribute set to true, it can be left empty, even though its element declaration may have required content.

Notation

A notation is used to identify the format of a piece of data. Values of elements and attributes that are of type, NOTATION, must come from the names of declared notations. See: http://www.w3.org/TR/xmlschema-1/#cNotation_Declarations.

Preserve Whitespace

Policy Preserve whitespaces exactly as they appear in instances.

Prohibited Derivations (Applicabile a type definitions).

Derivation methods that cannot be used to create sub-types from a given type definition.

Prohibited Substitutions (Applicabile a definizioni di tipo complesso).

Prevents sub-types that have been derived using the specified derivation methods from validating element instances in place of the given type definition.

Replace Whitespace Policy

Replace tab, line feed, and carriage return characters with space character (Unicode character 32).

Sequence Model Group

Child elements and model groups must be provided in the specified order in instances. See: http://www.w3.org/TR/xmlschema-1/#element-sequence.

Substitution Group

Elements that are members of a substitution group can be used wherever the head element of the substitution group is referenced.

Substitution Group Exclusions (Applicabile a dichiarazioni di elementi).

Prohibits dichiarazioni di elementi from nominating themselves as being able to substitute a given element declaration, if they have types that are derived from the original element's type using the specified derivation methods.

Target Namespace

The target namespace identifies the namespace that components in this schema belongs to. If no target namespace is provided, then the schema components do not belong to any namespace.

Uniqueness Constraint

Ensures uniqueness of an element/attribute value, or a combination of values, within a specified scope. See: http://www.w3.org/TR/xmlschema-1/#cIdentity-constraint_Definitions.