tr><tr id=ValueType-STRING><td><code>STRING</code></td><td><p>An undiscriminated variable-length string.</p></td></tr><tr id=ValueType-INT64><td><code>INT64</code></td><td><p>An undiscriminated 64-bit signed integer.</p></td></tr><tr id=ValueType-DOUBLE><td><code>DOUBLE</code></td><td><p>An undiscriminated 64-bit floating-point value.</p></td></tr><tr id=ValueType-BOOL><td><code>BOOL</code></td><td><p>An undiscriminated boolean value.</p></td></tr><tr id=ValueType-TIMESTAMP><td><code>TIMESTAMP</code></td><t