JSON-LD is a JSON for Linking Data. JSON-LD Crawler is one of the metadata crawler for cross search engine. If you are interested in JSON-LD, please refer to these sites.
##Usage
php urljson-ld.php sample.html
@BiologicalDatabaseEntry_isEntryOf_BiologicalDatabase_name=Sagace
@BiologicalDatabaseEntry_isEntryOf_BiologicalDatabase_url=http://sagace.nibio.go.jp
@BiologicalDatabaseEntry_seeAlso_BiologicalDatabaseEntry_entryID=154700
@BiologicalDatabaseEntry_seeAlso_BiologicalDatabaseEntry_url=http://omim.org/entry/154700
@BiologicalDatabaseEntry_seeAlso_BiologicalDatabase_name=OMIM
@BiologicalDatabaseEntry_taxon_BiologicalDatabaseEntry_name=Homo sapiens
@BiologicalDatabaseEntry_taxon_BiologicalDatabaseEntry_url=http://www.uniprot.org/taxonomy/9606
@BiologicalDatabaseEntry_taxon_BiologicalDatabaseEntry_entryID=9606
@MedicalCondition_code_MedicalCode_codeValue=Q87.4
@MedicalCondition_code_MedicalCode_codingSystem=ICD-10
If you want to crawl JSON data,
php urljson-ld.php test/combi.json