# blobs
<table><thead><tr><th>Column Name</th><th>Data Type</th><th>Nullity</th><th>Default value</th><th>Description</th></tr></thead><tbody><tr><th><code>blobId</code></th><td>Text</td><td>Non-null</td><td>&nbsp;</td><td><p>The unique ID of the blob (e.g. <code>XXbfAJXqWrYnSXcelLFA</code>).</p><aside class="admonition important"><p>The ID is actually a hash of the content, see <code>AbstractBeccaEntity#saveBlob</code>! It is a logic error to modify an existing blob.</p></aside></td></tr><tr><th><code>content</code></th><td>Text</td><td>Nullable</td><td><code>null</code></td><td><p>The content of the blob, can be either:</p><ul><li data-list-item-id="e1f1b8623c64f95f19751bbe494063d0f">text (for plain text notes or HTML notes).</li><li data-list-item-id="e5bbdee6fe5e5b12361fc74e339c9f1db">binary (for images and other types of attachments)</li></ul></td></tr><tr><th><code>dateModified</code></th><td>Text</td><td>Non-null</td><td>&nbsp;</td><td>Creation date with timezone offset (e.g. <code>2023-11-08 18:43:44.204+0200</code>)</td></tr><tr><th><code>utcDateModified</code></th><td>Text</td><td>Non-null</td><td>&nbsp;</td><td><p>Creation date in UTC format (e.g. <code>2023-11-08 16:43:44.204Z</code>).</p><p>Blobs cannot be modified, so this timestamp specifies when the blob was created.</p></td></tr></tbody></table>