Downloads the Salmon Domain Ontology using HTTP content negotiation and caches
the response using ETag / Last-Modified headers when available.
Usage
fetch_salmon_ontology(
url = "https://w3id.org/smn/",
accept = "text/turtle, application/rdf+xml;q=0.8",
cache_dir = file.path(tempdir(), "metasalmon-ontology-cache"),
fallback_urls = c("https://w3id.org/smn",
"https://dfo-pacific-science.github.io/salmon-domain-ontology/smn.ttl")
)
Arguments
- url
Ontology URL. Default is the canonical SMN namespace root.
- accept
Accept header; defaults to turtle with RDF/XML fallback.
- cache_dir
Directory to store cached ontology and headers.
- fallback_urls
Optional fallback ontology URLs tried if the primary url fails.
Value
Path to the cached ontology file (character string).
