{"status":"codebook-reviewed-data-not-collected","codebook":[{"hs_revision":"HTSUS 2026","hs_code":"3818","official_description":"Chemical elements doped for use in electronics; chemical compounds doped for use in electronics","captures":"Selected electronic-grade doped semiconductor material inputs.","excludes":"Many upstream chemicals and gases classified by composition elsewhere.","semiconductor_specificity":"mixed","revision_note":"Heading-level V1 codebook; do not combine with other HS revisions without concordance.","source_id":"src_usitc_hts_2026"},{"hs_revision":"HTSUS 2026","hs_code":"8486","official_description":"Machines and apparatus of a kind used solely or principally for the manufacture of semiconductor boules or wafers, semiconductor devices, electronic integrated circuits or flat panel displays","captures":"Core wafer-fabrication and certain assembly equipment.","excludes":"General-purpose factory equipment and many supporting subsystems.","semiconductor_specificity":"mixed","revision_note":"Heading also includes flat-panel-display equipment; subheading review is required for trade totals.","source_id":"src_usitc_hts_2026"},{"hs_revision":"HTSUS 2026","hs_code":"8541","official_description":"Semiconductor devices; photosensitive semiconductor devices; light-emitting diodes; mounted piezoelectric crystals; parts thereof","captures":"Discrete semiconductor devices and specified photosensitive devices.","excludes":"Electronic integrated circuits classified under heading 8542.","semiconductor_specificity":"mixed","revision_note":"Heading includes non-AI discrete and optoelectronic devices.","source_id":"src_usitc_hts_2026"},{"hs_revision":"HTSUS 2026","hs_code":"8542","official_description":"Electronic integrated circuits; parts thereof","captures":"Processors, memories, amplifiers, and other integrated circuits at applicable subheadings.","excludes":"Does not separate AI accelerators from other processors without national-subheading and product context.","semiconductor_specificity":"broad","revision_note":"Useful for broad semiconductor trade only; AI-specific claims are not defensible from heading-level data.","source_id":"src_usitc_hts_2026"}],"flows":[],"limitation":"The HTS codebook is reviewed at heading level. V1 does not publish trade-flow values because those headings are broader than AI semiconductors and require revision-aware subheading concordance."}