class final Core · roukmoute/pdf 0.7.1
PDF\Specification\Dictionary\StructureElementDictionaryTable323\AltEntryTable 323, /Alt; PDF type: text string; Optional.Inheritance and contracts
Parent : PDF\Specification\SchemaEntry
Definition in the specification
Table 323 · Entries in a structure element dictionary
ISO 32000-1:2008, §14.7.2 · PDF page 567 ↗
/Alt text string
(Optional) An alternate description of the structure element and its children in human-readable form, which is useful when extracting the document’s contents in support of accessibility to users with disabilities or for other purposes (see 14.9.3, “Alternate Descriptions”).
Qualifier: Optional
Conditional descriptions remain traceable. A definition alone does not implement a codec, a signature or every format mechanism. Read the coverage.
Construction
__construct()
public function __construct(PDF\Syntax\Object\StringType|PDF\Syntax\Object\IndirectReference $value)Inherited methods
3 methods from parents and contracts
definition()
public function definition(): PDF\Specification\EntryDefinitionkey()
public function key(): PDF\Syntax\Object\NameTypevalue()
public function value(): PDF\Syntax\FileStructure\BasicTypeProperties
| Declaration | Origin and documentation |
|---|---|
public readonly PDF\Syntax\Object\NameType $key | PDF\Syntax\Object\DictionaryObject\Entry |
public readonly PDF\Syntax\FileStructure\BasicType $value | PDF\Syntax\Object\DictionaryObject\Entry |
Constants
| Name | PHP value | Origin |
|---|---|---|
KEY | | PDF\Specification\Dictionary\StructureElementDictionaryTable323\AltEntry |
TABLE | | PDF\Specification\Dictionary\StructureElementDictionaryTable323\AltEntry |
VARIABLE | | PDF\Specification\SchemaEntry |