Feature: OPAC discoverability

Description

OPAC records are discoverable through external search engines.

Feature Category

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Software Rundown

Software Status Notes
Koha 3.20 (2015) ?
Evergreen 2.8 (2015) YES

A number of discoverability enhancements have been made to the catalog to better support search engines:
* Titles of catalog pages now follow a "Page title - Library name" pattern to provide more specific titles in search results, bookmarks, and browser tabs.
* The OpenSearch title now specifies the library name instead of the generic "Evergreen OpenSearch" at every scope.
* Subject headings are now exposed as schema:about properties instead of schema:keyword.
* Electronic resources are now assigned a schema:url property, and any notes or link text are assigned a schema:description property.
* Given a Library of Congress relator code for 1xx and 7xx fields, we now surface the URL for that relator code along with the schema:contributor property to give machines a better chance of understanding how the person or organization actually contributed to this work.
* Linking out to related records:
** Given an LCCN (010 field), we link to the corresponding Library of Congress record using schema:sameAs.
** Given an OCLC number (035 field, subfield a beginning with (OCoLC)), we link to the corresponding WorldCat record using schema:sameAs.
** Given a URI (024 field, subfield 2 = 'uri'), we link to the corresponding OCLC Work Entity record using schema:exampleOfWork.
* The sitemap generator script now includes located URIs as well as copies listed in the asset.opac_visible_copies materialized view, and checks the children or ancestors of the requested libraries for holdings as well.
* Links that robots should not crawl, such as search result links, are now marked with the @rel="nofollow" property.
* Catalog pages for record details and for library descriptions now express a @rel="canonical" link to simplify the number of variations of page URLs that could otherwise have been derived from different search parameters.
* Catalog pages that do not exist now return a proper 404 "HTTP_NOT_FOUND" HTTP status code, and record detail pages for records that have been deleted now return a proper 410 "HTTP_GONE" HTTP status code, instead of returning a misleading 200 "OK" HTTP status code.
* Record detail and library pages now include Open Graph Protocol markup. (2.8)