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Abstract

REQUIRED REPEATABLE MULTILINGUAL

MODS Element name: <subject><topic>

Short definition: Topic the described resource is about.

Input guidelines: At least one English topic term required. Use authority control if appropriate. Follow your unit/collection guidelines.

Definition

Topic the described resource is about.

DAMS input form fields

(Topic)

DAMS form field name

form field type

required

MODS element

Collections Portal display

notes

Subject - Topic Term

text field

yes

subject/topic

Topic

Topic Term Language

text field

yes

subject[@lang]/topic

(attribute of subject)

N/A

At least one English ("eng") topic term required. For additional terms, enter the appropriate three-letter language code from ISO-639-2b language codes.

MODS Element description

Element <subject>

http://www.loc.gov/standards/mods/userguide/subject.html

Guidelines for use

<subject> is a container element that contains subelements relating to the subject aspect of the resource.

Attributes

Attribute name

Details

XPath syntax examples

lang

value:

ISO-639-2 language code

At least one English ("eng") topic term required. For additional terms, enter the appropriate three-letter language code from ISO-639-2b language codes.

subject[@lang]

Subelements

The following subelements of <subject>are used in the DAMS:

topic
(temporal)
(geographic)
(hierarchicalGeographic)
(cartographics)
(geographicCode)

Subelement <subject><topic>

Guidelines for use

At least one English topic term required. Use authority control if appropriate. Follow your unit/collection guidelines.

Attributes

No attributes for <temporal> are currently implemented in the DAMS.

Subelements

No subelements for <topic>.

XML Examples

<subject lang="eng">
	<topic>Xeriscaping</topic>
</subject>

Mappings

Dublin Core

Depending on the direction of mapping necessary, check

DC to MODS: https://www.loc.gov/standards/mods/dcsimple-mods.html
MODS to DC: http://www.loc.gov/standards/mods/mods-dcsimple.html

MARC 21

see http://www.loc.gov/standards/mods/mods-mapping.html.

MARC 21 field	Mapping condition	MODS element	Notes
*		subject/topic	Do not use the topic[@authority] attribute when mapping topic information.

Solr

In general, all MODS metadata is imported into the DAMS Solr server upon ingest. The ingest process generates Solr fields typically named according to the following schema:

mods_value*_suffix

where

value* can be one or multiple element, subelement or attribute names that allow to distinguish Solr fields
suffix is s, t, ss, ms or mt, which refers to the type of data stored in a Solr field and how it is indexed. The Solr index usually contains multiple copies of each field with the same content, distinguished by their suffix.

The following table shows mappings between MODS elements and Solr fields for those fields that are currently used for display in the Collections portal, or where additional processing happens in Islandora or during the publishing process. Suffixes are ignored, unless relevant for the mapping.

MODS element	Mapping condition	Solr DAMS	Solr Collections Portal	Notes
subject/topic		mods_subject_temporal	mods_subject_temporal
subject/topic		mods_subject_temporal	display_topic_ms	Used to create facets on the Collections portal start page. The Solr field display_topic is generated by capitalizing the first letter of the first word for each topic value.