https://dnsarchive.net/
DNSArchive | DNS, rDNS, IP intelligence feed, Web metadata Search & Threat Intelligence
Explore historical DNS records, domain changes, web search data, and IP reputation. DNSArchive powers threat intelligence and investigations. DNS Repository...
ip intelligencemetadata searchdnsarchiverdnsfeed
https://developers-dot-devsite-v2-prod.appspot.com/search/docs/appearance/structured-data/image-license-metadata
Google Images SEO: Image Metadata | Google Search Central | Documentation | Google for Developers
When you specify image metadata, Google Images can show more details about the image, such as who the creator is, how people can use an image, and credit...
google imagesmetadata searchseocentraldocumentation
https://patents.google.com/patent/US8700673B2/en
US8700673B2 - Mechanisms for metadata search in enterprise applications - Google Patents
Metadata search is enhanced by utilizing relationship data indicating relationships between metadata items. A server generates an index mapping metadata items...
metadata searchenterprise applicationsmechanismsgooglepatents
https://groups.google.com/g/dspace-tech/c/iZz4HMcDxSg
Browse By Text/Metadata search behaviour
browse bymetadata searchtextbehaviour
https://search.crossref.org/
Crossref Metadata Search
crossrefmetadatasearch
https://metadata.emory.edu/systems/index.html
Search and Discovery Systems | Metadata | Emory University
search and discoverysystemsmetadataemoryuniversity