Module jonix.onix3

Package com.tectonica.jonix.onix3

Class MainSubject

java.lang.Object

com.tectonica.jonix.onix3.MainSubject

All Implemented Interfaces:

OnixFlag, OnixTag, Serializable

public class MainSubject
extends Object
implements OnixFlag, Serializable

Main subject flag

An empty element that identifies an instance of the <Subject> composite as representing the primary or main subject category for the product. The main category may be expressed in more than one subject scheme, ie there may be two or more instances of the <Subject> composite, using different schemes, each carrying the <MainSubject/> flag, so long as there is only one main category per scheme (ie per value of <SubjectSchemeIdentifier>). Optional, though for some subject schemes (eg Thema), <MainSubject/> can be vital in order to prevent potential misinterpretation of a group of subject codes, and for other schemes which by their nature only allow one code (eg Dewey), <MainSubject> is not relevant. Non-repeating in each occurrence of the <Subject> composite.

Format	XML empty element
Reference name	<MainSubject>
Short tag	<x425>
Cardinality	0…1
Example	<MainSubject/>

This tag may be included in the following composites:

• <Subject>

Possible placements within ONIX message:

• Product ⯈ DescriptiveDetail ⯈ Subject ⯈ MainSubject
• Product ⯈ ContentDetail ⯈ ContentItem ⯈ Subject ⯈ MainSubject

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
String	datestamp	(type: dt.DateOrDateTime)
static final MainSubject	EMPTY
static final String	refname
static final String	shortname
String	sourcename	(type: dt.NonEmptyString)
RecordSourceTypes	sourcetype

Constructor Summary

Constructors

Constructor	Description
MainSubject()
MainSubject(Element element)

Method Summary

Modifier and Type	Method	Description
boolean	exists()	indicates whether this tag exists in the ONIX record
void	ifExists(Consumer<MainSubject> action)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

refname

public static final String refname

See Also:

• Constant Field Values

shortname

public static final String shortname

See Also:

• Constant Field Values

datestamp

public String datestamp

(type: dt.DateOrDateTime)

sourcename

public String sourcename

(type: dt.NonEmptyString)

sourcetype

public RecordSourceTypes sourcetype

EMPTY

public static final MainSubject EMPTY

Constructor Details

MainSubject

public MainSubject()

MainSubject

public MainSubject(Element element)

Method Details

exists

public boolean exists()

Description copied from interface: OnixTag

indicates whether this tag exists in the ONIX record

Specified by:

exists in interface OnixTag

Returns:

whether this tag (<MainSubject> or <x425>) is explicitly provided in the ONIX XML

ifExists

public void ifExists(Consumer<MainSubject> action)