Tatak Schema: A Free JSON-LD Builder and Checker for Philippine Small Businesses

// src/js/schema-core.js — validate(), LocalBusiness branch (excerpt)
    if (cc === 'PH' && addr.postalCode && !/^\d{4}$/.test(str(addr.postalCode))) add('warn', 'address.postalCode', 'Philippine ZIP codes have 4 digits.');
  }
  if (obj.telephone) {
    if (!phoneOk(obj.telephone)) {
      var hint = phPhoneHint(obj.telephone);
      add('warn', 'telephone', 'Use international format' + (hint ? ', e.g. "' + hint + '"' : ' starting with +63') + '.');
    }
  } else rec('telephone', 'A phone number', 'shown on maps and call buttons');
  rec('url', 'Website URL');
  rec('image', 'A photo or logo');
  rec('openingHoursSpecification', 'Opening hours', 'lets results show "Open" or "Closed"');
  rec('priceRange', 'Price range');
  if (obj.priceRange && str(obj.priceRange).length > 100) add('warn', 'priceRange', 'Keep price range under 100 characters.');
  if (obj.geo) {
    var lat = Number(obj.geo.latitude), lng = Number(obj.geo.longitude);
    if (!isFinite(lat) || lat < -90 || lat > 90) {
      var swapped = isFinite(lng) && Math.abs(lng) <= 90 && Math.abs(lat) <= 180;
      add('error', 'geo.latitude', 'Latitude must be a number between -90 and 90.' + (swapped ? ' It looks like latitude and longitude are swapped.' : ''));
    }
    else if (!isFinite(lng) || lng < -180 || lng > 180) add('error', 'geo.longitude', 'Longitude must be a number between -180 and 180.');
    else if (addr && str(addr.addressCountry) === 'PH' && (lat < 4.2 || lat > 21.5 || lng < 116 || lng > 127.1)) {
      add('warn', 'geo', 'The map pin is outside the Philippines. Latitude and longitude may be swapped.');
    }
  } else rec('geo', 'A map pin (latitude and longitude)');

// src/js/schema-core.js — safe output
/** JSON safe to place inside <script>: "<" is escaped so "</script>" can't break out. */
function toJson(obj, minify) {
  return JSON.stringify(obj, null, minify ? 0 : 2).replace(/</g, '\\u003c');
}

function toScriptTag(obj, minify) {
  return '<script type="application/ld+json">\n' + toJson(obj, minify) + '\n</script>';
}

// Philippine phone hint used by the validator
function phPhoneHint(s) {
  var d = str(s).replace(/[\s().-]/g, '');
  if (/^09\d{9}$/.test(d)) return '+63 ' + d.slice(1, 4) + ' ' + d.slice(4, 7) + ' ' + d.slice(7);
  if (/^0\d{7,10}$/.test(d)) return '+63 ' + d.slice(1);
  return '';
}

<!-- 1. Copy the script tag from Tatak Schema -->
<script type="application/ld+json">
{
  "@context": "https://schema.org",
  "@type": "Restaurant",
  "name": "Kainan sa Poblacion",
  "telephone": "+63 917 555 0142",
  "address": { "@type": "PostalAddress", "addressLocality": "Valencia City", "postalCode": "8709", "addressCountry": "PH" }
}
</script>

<!-- 2. Paste it:
     WordPress → Custom HTML block (or your SEO plugin's schema field)
     Blogger   → post HTML view, at the top
     Any site  → inside <head> or <body> -->

# 3. Run the project's tests (Node 14+)
node tests/core.test.js   # 15/15 tests passed