diff --git a/API.md b/API.md
index 803418c..34fe1e1 100644
--- a/API.md
+++ b/API.md
@@ -4,6 +4,52 @@ This document is auto-generated from the JSDoc comments in `src/store` by runnin
 
 The store is exposed as a `LibDashStore` instance (see `src/index.js`). Each method is an async function that takes a `pool` (mssql connection pool) at construction time and returns a callable function. Methods are grouped by the namespace they are exposed under.
 
+## Database Schema
+
+> **Convention**: `PK` primary key · `?` nullable · `->tbl` foreign key · `UQ` unique · `s(N)` string · `txt` text · `i` int · `bi` bigint · `f` float · `d` decimal · `b` bit · `dt` datetime · `bin` binary · `=val` default
+
+- **article**: `id PK, sku?:s(100) UQ, unit_id->unit, unitamount:f, weight:f, brand_id?->brand, articlelist_id?->articlelist, optionslist_id?->optionslist, is_father:b=0, fatherarticle_id?->article, fathersort:i=0, created_at:dt, updated_at:dt, UQ(fatherarticle_id, fathersort)`
+- **articleean**: `id PK, article_id->article, ean:s(50) UQ`
+- **articlehistory**: `id PK, article_id->article, companyuser_id?->companyuser, date:dt, text:txt`
+- **articlelist**: `id PK`
+- **articlelistarticle**: `id PK, articlelist_id->articlelist, article_id->article, count:i=1, sort:i=0, UQ(articlelist_id, article_id), UQ(articlelist_id, sort)`
+- **articlepic**: `id PK, article_id->article, pic_id->pic, sort:i=0, UQ(article_id, pic_id), UQ(article_id, sort)`
+- **articlesupplier**: `id PK, article_id->article, entity_id->entity, price_id?->price, sku?:s(100), stock?:f, pu:f=1, sort:i=0, UQ(article_id, entity_id), UQ(article_id, sort)`
+- **articletext**: `id PK, article_id->article, language_id->language, name:s(255), slug:s(255), seo?:txt, desc?:txt, UQ(article_id, language_id)`
+- **brand**: `id PK, company_id->company, name:s(255), gsprpinfo?:txt, UQ(company_id, name)`
+- **brandpic**: `id PK, brand_id->brand, pic_id->pic, sort:i=0, UQ(brand_id, pic_id), UQ(brand_id, sort)`
+- **category**: `id PK, parent_id?->category, sort:i=0`
+- **categoryarticle**: `id PK, category_id->category, article_id->article, UQ(category_id, article_id)`
+- **categorypic**: `id PK, category_id->category, pic_id->pic, sort:i=0, UQ(category_id, pic_id), UQ(category_id, sort)`
+- **categorytext**: `id PK, category_id->category, language_id->language, name:s(255), slug:s(255), seo?:txt, desc?:txt, UQ(category_id, language_id)`
+- **company**: `id PK, name:s(255) UQ, root_category_id?->category, default_language_id?->language, taxrate?->tax, reducedtaxrate?->tax, taxfreerate?->tax, poscustomergroup_id->customergroup`
+- **companysetting**: `id PK, company_id->company, key:s(255), value:txt, frontend:b=0, writeonly:b=0, UQ(company_id, key)`
+- **companyuser**: `id PK, google_auth_id->google_auth, company_id->company, UQ(google_auth_id, company_id)`
+- **customergroup**: `id PK, name:s(255), sort:i=0, company_id?->company`
+- **entity**: `id PK, customergroup_id->customergroup, first_name?:s(255), name:s(255), number?:s(100), created_at:dt, updated_at:dt, UQ(company_id, number)`
+- **entityaddress**: `id PK, entity_id->entity, first_name?:s(255), name?:s(255), street?:s(255), streetnumber?:s(50), zip?:s(50), city?:s(255), county?:s(255), addresstype:s(50), sort:i=0`
+- **entitycontact**: `id PK, entity_id->entity, contacttype:s(50), contact:s(255), sort:i=0`
+- **entityhistory**: `id PK, entity_id->entity, companyuser_id?->companyuser, date:dt, text:txt`
+- **file**: `id PK, hash:s(64), mimetype:s(255), name:s(255), size:bi, created:dt, modified:dt, content:bin, thumbavif?:bin, thumbx?:i, thumby?:i`
+- **google_auth**: `id PK, email:s(320) UQ, picture?:s(2048), picturebinary?:bin, sub?:s(255) UQ, created_at:dt, selected_company?->company`
+- **language**: `id PK, iso639:s(10) UQ`
+- **ledger**: `id PK, manifestarticle_id->manifestarticle, transaction_type:s(100), amount:f, transaction_text:txt, hash_version:i, prev_hash?:s(128) [append-only]`
+- **manifest**: `id PK, company_id->company, number:s(100), type:s(100), entity_id?->entity, external_number?:s(100), date:dt`
+- **manifestarticle**: `id PK, manifest_id->manifest, sku?:s(100), name?:s(255), pu:f=1, amount:f, net:f, comment?:txt, rebate:f=0, taxrate:f=0`
+- **manifestattachment**: `id PK, manifest_id->manifest, file_id->file, sort:i=0, UQ(manifest_id, sort)`
+- **meta**: `key:s(255) PK, value:txt`
+- **numbers**: `id PK, company_id->company, type:s(100), prefix:s(50)='', padding:i=0, next:i=1, UQ(company_id, type)`
+- **optionslist**: `id PK`
+- **optionslistarticle**: `id PK, optionslist_id->optionslist, article_id->article, count:i=1, sort:i=0, mandated:b=0, UQ(optionslist_id, article_id), UQ(optionslist_id, sort)`
+- **pic**: `id PK, w:i, h:i, size:bi, hash:s(64) UQ, thumbw:i, thumbh:i, thumbhash:s(64), source:txt, fullbinary:bin, thumbbinary:bin`
+- **posterminal**: `id PK, company_id->company, name:s(255), token?:s(255) UQ, pairingpin:s(50)`
+- **posterminalcategory**: `id PK, posterminal_id->posterminal, category_id->category, UQ(posterminal_id, category_id)`
+- **price**: `id PK, tax_id->tax, article_id->article, minmultiplier:d(18,4)=1, customergroup_id->customergroup, net:f`
+- **syncpos**: `id PK, company_id->company, paircode:s(50) UQ, token?:s(255) UQ`
+- **tax**: `id PK, rate:d(18,4) UQ`
+- **unit**: `id PK, company_id->company, si:s(50), basesi:s(50), basesifactor:f, UQ(company_id, si)`
+- **unittext**: `id PK, unit_id->unit, language_id->language, symbol:s(50), name:s(255), UQ(unit_id, language_id)`
+
 ## Table of Contents
 
 - [companyuser](API.companyuser.md)
diff --git a/generate-api-doc.js b/generate-api-doc.js
index 6ca1c06..9803954 100644
--- a/generate-api-doc.js
+++ b/generate-api-doc.js
@@ -308,6 +308,50 @@ function render() {
     written.push({ moduleName, sectionPath, bytes: markdown.length });
   }
 
+const SCHEMA_TABLES = [
+  ['article', 'id PK, sku?:s(100) UQ, unit_id->unit, unitamount:f, weight:f, brand_id?->brand, articlelist_id?->articlelist, optionslist_id?->optionslist, is_father:b=0, fatherarticle_id?->article, fathersort:i=0, created_at:dt, updated_at:dt, UQ(fatherarticle_id, fathersort)'],
+  ['articleean', 'id PK, article_id->article, ean:s(50) UQ'],
+  ['articlehistory', 'id PK, article_id->article, companyuser_id?->companyuser, date:dt, text:txt'],
+  ['articlelist', 'id PK'],
+  ['articlelistarticle', 'id PK, articlelist_id->articlelist, article_id->article, count:i=1, sort:i=0, UQ(articlelist_id, article_id), UQ(articlelist_id, sort)'],
+  ['articlepic', 'id PK, article_id->article, pic_id->pic, sort:i=0, UQ(article_id, pic_id), UQ(article_id, sort)'],
+  ['articlesupplier', 'id PK, article_id->article, entity_id->entity, price_id?->price, sku?:s(100), stock?:f, pu:f=1, sort:i=0, UQ(article_id, entity_id), UQ(article_id, sort)'],
+  ['articletext', 'id PK, article_id->article, language_id->language, name:s(255), slug:s(255), seo?:txt, desc?:txt, UQ(article_id, language_id)'],
+  ['brand', 'id PK, company_id->company, name:s(255), gsprpinfo?:txt, UQ(company_id, name)'],
+  ['brandpic', 'id PK, brand_id->brand, pic_id->pic, sort:i=0, UQ(brand_id, pic_id), UQ(brand_id, sort)'],
+  ['category', 'id PK, parent_id?->category, sort:i=0'],
+  ['categoryarticle', 'id PK, category_id->category, article_id->article, UQ(category_id, article_id)'],
+  ['categorypic', 'id PK, category_id->category, pic_id->pic, sort:i=0, UQ(category_id, pic_id), UQ(category_id, sort)'],
+  ['categorytext', 'id PK, category_id->category, language_id->language, name:s(255), slug:s(255), seo?:txt, desc?:txt, UQ(category_id, language_id)'],
+  ['company', 'id PK, name:s(255) UQ, root_category_id?->category, default_language_id?->language, taxrate?->tax, reducedtaxrate?->tax, taxfreerate?->tax, poscustomergroup_id->customergroup'],
+  ['companysetting', 'id PK, company_id->company, key:s(255), value:txt, frontend:b=0, writeonly:b=0, UQ(company_id, key)'],
+  ['companyuser', 'id PK, google_auth_id->google_auth, company_id->company, UQ(google_auth_id, company_id)'],
+  ['customergroup', 'id PK, name:s(255), sort:i=0, company_id?->company'],
+  ['entity', 'id PK, customergroup_id->customergroup, first_name?:s(255), name:s(255), number?:s(100), created_at:dt, updated_at:dt, UQ(company_id, number)'],
+  ['entityaddress', 'id PK, entity_id->entity, first_name?:s(255), name?:s(255), street?:s(255), streetnumber?:s(50), zip?:s(50), city?:s(255), county?:s(255), addresstype:s(50), sort:i=0'],
+  ['entitycontact', 'id PK, entity_id->entity, contacttype:s(50), contact:s(255), sort:i=0'],
+  ['entityhistory', 'id PK, entity_id->entity, companyuser_id?->companyuser, date:dt, text:txt'],
+  ['file', 'id PK, hash:s(64), mimetype:s(255), name:s(255), size:bi, created:dt, modified:dt, content:bin, thumbavif?:bin, thumbx?:i, thumby?:i'],
+  ['google_auth', 'id PK, email:s(320) UQ, picture?:s(2048), picturebinary?:bin, sub?:s(255) UQ, created_at:dt, selected_company?->company'],
+  ['language', 'id PK, iso639:s(10) UQ'],
+  ['ledger', 'id PK, manifestarticle_id->manifestarticle, transaction_type:s(100), amount:f, transaction_text:txt, hash_version:i, prev_hash?:s(128) [append-only]'],
+  ['manifest', 'id PK, company_id->company, number:s(100), type:s(100), entity_id?->entity, external_number?:s(100), date:dt'],
+  ['manifestarticle', 'id PK, manifest_id->manifest, sku?:s(100), name?:s(255), pu:f=1, amount:f, net:f, comment?:txt, rebate:f=0, taxrate:f=0'],
+  ['manifestattachment', 'id PK, manifest_id->manifest, file_id->file, sort:i=0, UQ(manifest_id, sort)'],
+  ['meta', 'key:s(255) PK, value:txt'],
+  ['numbers', 'id PK, company_id->company, type:s(100), prefix:s(50)=\'\', padding:i=0, next:i=1, UQ(company_id, type)'],
+  ['optionslist', 'id PK'],
+  ['optionslistarticle', 'id PK, optionslist_id->optionslist, article_id->article, count:i=1, sort:i=0, mandated:b=0, UQ(optionslist_id, article_id), UQ(optionslist_id, sort)'],
+  ['pic', 'id PK, w:i, h:i, size:bi, hash:s(64) UQ, thumbw:i, thumbh:i, thumbhash:s(64), source:txt, fullbinary:bin, thumbbinary:bin'],
+  ['posterminal', 'id PK, company_id->company, name:s(255), token?:s(255) UQ, pairingpin:s(50)'],
+  ['posterminalcategory', 'id PK, posterminal_id->posterminal, category_id->category, UQ(posterminal_id, category_id)'],
+  ['price', 'id PK, tax_id->tax, article_id->article, minmultiplier:d(18,4)=1, customergroup_id->customergroup, net:f'],
+  ['syncpos', 'id PK, company_id->company, paircode:s(50) UQ, token?:s(255) UQ'],
+  ['tax', 'id PK, rate:d(18,4) UQ'],
+  ['unit', 'id PK, company_id->company, si:s(50), basesi:s(50), basesifactor:f, UQ(company_id, si)'],
+  ['unittext', 'id PK, unit_id->unit, language_id->language, symbol:s(50), name:s(255), UQ(unit_id, language_id)'],
+];
+
   // Write the index API.md linking to each section file.
   const lines = [];
   lines.push('# LibDashStore API');
@@ -320,6 +364,16 @@ function render() {
     'The store is exposed as a `LibDashStore` instance (see `src/index.js`). Each method is an async function that takes a `pool` (mssql connection pool) at construction time and returns a callable function. Methods are grouped by the namespace they are exposed under.',
   );
   lines.push('');
+  lines.push('## Database Schema');
+  lines.push('');
+  lines.push(
+    '> **Convention**: `PK` primary key · `?` nullable · `->tbl` foreign key · `UQ` unique · `s(N)` string · `txt` text · `i` int · `bi` bigint · `f` float · `d` decimal · `b` bit · `dt` datetime · `bin` binary · `=val` default',
+  );
+  lines.push('');
+  for (const [table, cols] of SCHEMA_TABLES) {
+    lines.push(cols ? `- **${table}**: \`${cols}\`` : `- **${table}**`);
+  }
+  lines.push('');
   lines.push('## Table of Contents');
   lines.push('');
 
@@ -343,3 +397,4 @@ console.log(`Wrote ${outputPath} (${index.length} bytes)`);
 for (const { moduleName, sectionPath, bytes } of written) {
   console.log(`Wrote ${sectionPath} (${bytes} bytes)`);
 }
+