Concept Anchor
- Last Updated: May 29, 2026
- 2 minute read
- Semaphore
- Documentation
Summary of Usage
A Concept Anchor is used when the anchor is a concept modeled directly in the sequence (not from a taxonomy). The concept will have a preferred label and any number of alternative labels.
A concept anchor is a simple classification of the anchor being sought. It uses a single direct concept, which can have alternative labels if required. If more than one kind of concept is needed in the same sequence location, use a taxonomy anchor, which looks for several concepts represented in a hierarchy.
Examplification
The TTL format of an example model can be found here:
ConceptFactAndConceptAnchor.matchAcronymInBracket
To test:
- Create a new model and import the test TTL model file.
- Copy and paste the content text from the model’s associated test into DA and classify.
Example Test Content and Responses
Test Content 1:
Food and Drug Administration (F. D. A.) is a federal agency of the Department of Health and Human Services.
gives this response:
<?xml version="1.0" encoding="UTF-8"?>
<response>
<STRUCTUREDDOCUMENT>
<META name="Type" value="TEXT (4003)"/>
<SYSTEM name="DeterminedLanguage" value="english"/>
<SYSTEM name="LanguageGuessed" value="no"/>
</STRUCTUREDDOCUMENT>
</response>
Test Content 2:
Food and Drug Administration (F. D. A.) is a federal agency of the Department of Health and Human Services in the United States (U. S.).
gives this response:
<?xml version="1.0" encoding="UTF-8"?>
<response>
<STRUCTUREDDOCUMENT>
<META name="Type" value="TEXT (4003)"/>
<SYSTEM name="DeterminedLanguage" value="english"/>
<SYSTEM name="LanguageGuessed" value="no"/>
<META name="DocumentType" value="Doc" score="1.00"/>
<META name="Mentioned FDA" value="fact - acronym for FDA" score="1.00"/>
</STRUCTUREDDOCUMENT>
</response>
Test Content 3:
Food and Drug Administration (F. D. A.) is a federal agency of the Department of Health and Human Services in the United States of America (U. S. A.).
gives this response:
<?xml version="1.0" encoding="UTF-8"?>
<response>
<STRUCTUREDDOCUMENT>
<META name="Type" value="TEXT (4003)"/>
<SYSTEM name="DeterminedLanguage" value="english"/>
<SYSTEM name="LanguageGuessed" value="no"/>
</STRUCTUREDDOCUMENT>
</response>
Test Content 4:
Food and Drug Administration (FDA) is a federal agency of the Department of Health and Human Services in the United States (US).
gives this response:
<?xml version="1.0" encoding="UTF-8"?>
<response>
<STRUCTUREDDOCUMENT>
<META name="Type" value="TEXT (4003)"/>
<SYSTEM name="DeterminedLanguage" value="english"/>
<SYSTEM name="LanguageGuessed" value="no"/>
</STRUCTUREDDOCUMENT>
</response>
Test Content 5:
Food and Drug Administration X (F. D. A. X.) is a federal agency of the Department of Health and Human Services in the United States of America (U. S.).
gives this response:
<?xml version="1.0" encoding="UTF-8"?>
<response>
<STRUCTUREDDOCUMENT>
<META name="Type" value="TEXT (4003)"/>
<SYSTEM name="DeterminedLanguage" value="english"/>
<SYSTEM name="LanguageGuessed" value="no"/>
</STRUCTUREDDOCUMENT>
</response>
Concept Anchor Properties
Mandatory hierarchical relationships
| Label | Range | Constraints |
|---|---|---|
| (none) |
Optional hierarchical relationships
| Label | Range | Constraints |
|---|---|---|
| anchor in | Context Elements | one or more allowed |
| not anchor in | Context Elements | one or more allowed |
| optional anchor in | Context Elements | one or more allowed |
Mandatory associative relationships
| Label | Range | Constraints |
|---|---|---|
| (none) |
Optional associative relationships
| Label | Range | Constraints |
|---|---|---|
| location | locations | one or more allowed |
Mandatory alternative labels
| Label | Range | Constraints |
|---|---|---|
| concept anchor label | Label | at least one required |
Optional alternative labels
| Label | Range | Constraints |
|---|---|---|
| forced preclusion label | Label | one or more allowed |
Mandatory metadata
| Label | Range | Constraints |
|---|---|---|
| (none) |
Optional metadata
| Label | Range | Constraints |
|---|---|---|
| field | String | only one allowed |
| debug | Boolean | only one allowed |