# Tag Validation

When working with formatted documents or CAT tool files, **tags must be preserved**.

### Why tags matter

Tags represent formatting or placeholders. If tags are missing or unbalanced, reimporting into your CAT tool can fail or formatting may be lost.

### Tag display modes

Supervertaler supports two ways of viewing formatting:

* **WYSIWYG mode**: shows *bold/italic/underline* as formatting
* **Tag view**: shows the raw markup (for example `<b>...</b>`)

Use **Tag view** when you are preparing to export/reimport and you want to verify the raw tags.

### Supported formatting tags

These tags are commonly used in Supervertaler projects:

| Tag              | Meaning       |
| ---------------- | ------------- |
| `<b>...</b>`     | Bold          |
| `<i>...</i>`     | Italic        |
| `<u>...</u>`     | Underline     |
| `<bi>...</bi>`   | Bold + Italic |
| `<sub>...</sub>` | Subscript     |
| `<sup>...</sup>` | Superscript   |

### CAT tool placeholder tags

CAT tools use placeholders/tags that must be preserved exactly:

| CAT tool           | Examples                              |
| ------------------ | ------------------------------------- |
| memoQ              | `{1}`, `[2}...{2]`, `{MQ}`, `{tspan}` |
| Trados Studio      | `<1>`, `</1>`, `<2/>`                 |
| Phrase (Memsource) | `{1}`, `{2}`                          |

### Tips

* Keep tags balanced (for example `<b>text</b>`, not `<b>text`).
* If you’re unsure, switch to Tag View and verify the raw tags.
* Don’t change tag numbers or names (for example `{1}` → `{2}`), even if the translation “looks fine”.
* If you insert a TM match, double-check that tags/placeholders still match the source.

:::caution For CAT tool workflows, don’t delete or edit placeholder tags unless you know exactly what they represent. :::


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