{"id":"S94001958","label":"Synchronous digital hierarchy (Data transmission)","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh94001958","normalized_label":"synchronous digital hierarchy (data transmission)","broader":["http://id.loc.gov/authorities/subjects/sh94001959"],"aliases":["SDH (Data transmission)"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh94001958","provider":"lcsh","revision":"a36d655d0192acdb","taxonomy_revision":"f050b5d4780b1289","title":"Synchronous digital hierarchy (Data transmission)","url":"/topics/S94001958","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"9532079734813509152","address_version":"morton4x16-v1","coordinates":[0,22,26988,38912],"answer_status":"Directory metadata; local answer requires separate source review","truth_status":"Subject descriptor, not a factual answer or a demonstrated knowledge gap","reviewed_answer":null}