{"category":"three-d","files":[{"category":"three-d","download_url":"/samples/download/three-d/step/step_assembly_exchange_sample.step/","extension":".step","ftype":"step","mime_type":"model/step","name":"step_assembly_exchange_sample.step","sha256":"b55ca67f8d68350aba7c0079507ac2b63fdcd23fc332b669d76ca3a3812b4b3f","size_bytes":1544,"size_human":"1.5 KB","url":"/static/samples/three-d/step/step_assembly_exchange_sample.step"},{"category":"three-d","download_url":"/samples/download/three-d/step/step_block_part_sample.step/","extension":".step","ftype":"step","mime_type":"model/step","name":"step_block_part_sample.step","sha256":"94353b4938d4df40cb1eca524901887f8f9297750600129432e7e086955a66e0","size_bytes":1371,"size_human":"1.3 KB","url":"/static/samples/three-d/step/step_block_part_sample.step"},{"category":"three-d","download_url":"/samples/download/three-d/step/step_reference_exchange_sample.step/","extension":".step","ftype":"step","mime_type":"model/step","name":"step_reference_exchange_sample.step","sha256":"2f4d41778d1e464bb0159d301aa17769cbf266c39c3b86d7b8f03913eb1880aa","size_bytes":517,"size_human":"517 B","url":"/static/samples/three-d/step/step_reference_exchange_sample.step"}],"format":"step","generated_at":"2026-09-18T07:54:34Z","methodology":["Validate extension and MIME detection before processing.","Benchmark performance with small and larger files.","Test malformed-input handling and error messaging."]}