diff --git a/README.md b/README.md
index e8f4995..ead4565 100755
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@ A pipeline for generating data representation in RDF out of raw data given in AS
 https://data2rdf.readthedocs.io/en/latest/
 
 <!-- Pytest Coverage Comment:Begin -->
-<a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/README.md"><img alt="Coverage" src="https://img.shields.io/badge/Coverage-88%25-green.svg" /></a><details><summary>Coverage Report </summary><table><tr><th>File</th><th>Stmts</th><th>Miss</th><th>Cover</th><th>Missing</th></tr><tbody><tr><td colspan="5"><b>data2rdf</b></td></tr><tr><td>&nbsp; &nbsp;<a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/__init__.py">__init__.py</a></td><td>5</td><td>0</td><td>100%</td><td>&nbsp;</td></tr><tr><td>&nbsp; &nbsp;<a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/config.py">config.py</a></td><td>26</td><td>1</td><td>1</td><td><a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/config.py#L 96%"> 96%</a></td></tr><tr><td>&nbsp; &nbsp;<a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/utils.py">utils.py</a></td><td>8</td><td>1</td><td>1</td><td><a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/utils.py#L 88%"> 88%</a></td></tr><tr><td>&nbsp; &nbsp;<a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/warnings.py">warnings.py</a></td><td>2</td><td>0</td><td>100%</td><td>&nbsp;</td></tr><tr><td colspan="5"><b>data2rdf/models</b></td></tr><tr><td>&nbsp; &nbsp;<a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/models/__init__.py">__init__.py</a></td><td>3</td><td>0</td><td>100%</td><td>&nbsp;</td></tr><tr><td>&nbsp; &nbsp;<a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/models/base.py">base.py</a></td><td>54</td><td>5</td><td>5</td><td><a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/models/base.py#L 91%"> 91%</a></td></tr><tr><td>&nbsp; &nbsp;<a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/models/graph.py">graph.py</a></td><td>100</td><td>7</td><td>7</td><td><a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/models/graph.py#L 93%"> 93%</a></td></tr><tr><td>&nbsp; &nbsp;<a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/models/mapping.py">mapping.py</a></td><td>39</td><td>1</td><td>1</td><td><a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/models/mapping.py#L 97%"> 97%</a></td></tr><tr><td>&nbsp; &nbsp;<a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/models/utils.py">utils.py</a></td><td>58</td><td>14</td><td>14</td><td><a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/models/utils.py#L 76%"> 76%</a></td></tr><tr><td colspan="5"><b>data2rdf/modes</b></td></tr><tr><td>&nbsp; &nbsp;<a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/modes/__init__.py">__init__.py</a></td><td>4</td><td>0</td><td>100%</td><td>&nbsp;</td></tr><tr><td colspan="5"><b>data2rdf/parsers</b></td></tr><tr><td>&nbsp; &nbsp;<a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/parsers/__init__.py">__init__.py</a></td><td>6</td><td>0</td><td>100%</td><td>&nbsp;</td></tr><tr><td>&nbsp; &nbsp;<a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/parsers/base.py">base.py</a></td><td>135</td><td>11</td><td>11</td><td><a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/parsers/base.py#L 92%"> 92%</a></td></tr><tr><td>&nbsp; &nbsp;<a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/parsers/csv.py">csv.py</a></td><td>168</td><td>20</td><td>20</td><td><a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/parsers/csv.py#L 88%"> 88%</a></td></tr><tr><td>&nbsp; &nbsp;<a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/parsers/excel.py">excel.py</a></td><td>174</td><td>17</td><td>17</td><td><a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/parsers/excel.py#L 90%"> 90%</a></td></tr><tr><td>&nbsp; &nbsp;<a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/parsers/json.py">json.py</a></td><td>205</td><td>37</td><td>37</td><td><a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/parsers/json.py#L 82%"> 82%</a></td></tr><tr><td>&nbsp; &nbsp;<a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/parsers/utils.py">utils.py</a></td><td>88</td><td>10</td><td>10</td><td><a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/parsers/utils.py#L 89%"> 89%</a></td></tr><tr><td colspan="5"><b>data2rdf/pipelines</b></td></tr><tr><td>&nbsp; &nbsp;<a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/pipelines/__init__.py">__init__.py</a></td><td>2</td><td>0</td><td>100%</td><td>&nbsp;</td></tr><tr><td>&nbsp; &nbsp;<a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/pipelines/main.py">main.py</a></td><td>82</td><td>9</td><td>9</td><td><a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/pipelines/main.py#L 89%"> 89%</a></td></tr><tr><td colspan="5"><b>data2rdf/qudt</b></td></tr><tr><td>&nbsp; &nbsp;<a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/qudt/__init__.py">__init__.py</a></td><td>0</td><td>0</td><td>100%</td><td>&nbsp;</td></tr><tr><td>&nbsp; &nbsp;<a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/qudt/utils.py">utils.py</a></td><td>42</td><td>12</td><td>12</td><td><a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/qudt/utils.py#L 71%"> 71%</a></td></tr><tr><td><b>TOTAL</b></td><td><b>1201</b></td><td><b>145</b></td><td><b>88%</b></td><td>&nbsp;</td></tr></tbody></table></details>
+<a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/README.md"><img alt="Coverage" src="https://img.shields.io/badge/Coverage-88%25-green.svg" /></a><details><summary>Coverage Report </summary><table><tr><th>File</th><th>Stmts</th><th>Miss</th><th>Cover</th><th>Missing</th></tr><tbody><tr><td colspan="5"><b>data2rdf</b></td></tr><tr><td>&nbsp; &nbsp;<a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/__init__.py">__init__.py</a></td><td>5</td><td>0</td><td>100%</td><td>&nbsp;</td></tr><tr><td>&nbsp; &nbsp;<a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/config.py">config.py</a></td><td>26</td><td>1</td><td>1</td><td><a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/config.py#L 96%"> 96%</a></td></tr><tr><td>&nbsp; &nbsp;<a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/utils.py">utils.py</a></td><td>8</td><td>1</td><td>1</td><td><a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/utils.py#L 88%"> 88%</a></td></tr><tr><td>&nbsp; &nbsp;<a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/warnings.py">warnings.py</a></td><td>2</td><td>0</td><td>100%</td><td>&nbsp;</td></tr><tr><td colspan="5"><b>data2rdf/models</b></td></tr><tr><td>&nbsp; &nbsp;<a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/models/__init__.py">__init__.py</a></td><td>3</td><td>0</td><td>100%</td><td>&nbsp;</td></tr><tr><td>&nbsp; &nbsp;<a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/models/base.py">base.py</a></td><td>54</td><td>5</td><td>5</td><td><a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/models/base.py#L 91%"> 91%</a></td></tr><tr><td>&nbsp; &nbsp;<a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/models/graph.py">graph.py</a></td><td>116</td><td>7</td><td>7</td><td><a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/models/graph.py#L 94%"> 94%</a></td></tr><tr><td>&nbsp; &nbsp;<a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/models/mapping.py">mapping.py</a></td><td>45</td><td>1</td><td>1</td><td><a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/models/mapping.py#L 98%"> 98%</a></td></tr><tr><td>&nbsp; &nbsp;<a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/models/utils.py">utils.py</a></td><td>58</td><td>14</td><td>14</td><td><a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/models/utils.py#L 76%"> 76%</a></td></tr><tr><td colspan="5"><b>data2rdf/modes</b></td></tr><tr><td>&nbsp; &nbsp;<a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/modes/__init__.py">__init__.py</a></td><td>4</td><td>0</td><td>100%</td><td>&nbsp;</td></tr><tr><td colspan="5"><b>data2rdf/parsers</b></td></tr><tr><td>&nbsp; &nbsp;<a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/parsers/__init__.py">__init__.py</a></td><td>6</td><td>0</td><td>100%</td><td>&nbsp;</td></tr><tr><td>&nbsp; &nbsp;<a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/parsers/base.py">base.py</a></td><td>135</td><td>11</td><td>11</td><td><a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/parsers/base.py#L 92%"> 92%</a></td></tr><tr><td>&nbsp; &nbsp;<a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/parsers/csv.py">csv.py</a></td><td>168</td><td>20</td><td>20</td><td><a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/parsers/csv.py#L 88%"> 88%</a></td></tr><tr><td>&nbsp; &nbsp;<a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/parsers/excel.py">excel.py</a></td><td>183</td><td>17</td><td>17</td><td><a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/parsers/excel.py#L 91%"> 91%</a></td></tr><tr><td>&nbsp; &nbsp;<a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/parsers/json.py">json.py</a></td><td>216</td><td>37</td><td>37</td><td><a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/parsers/json.py#L 83%"> 83%</a></td></tr><tr><td>&nbsp; &nbsp;<a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/parsers/utils.py">utils.py</a></td><td>90</td><td>10</td><td>10</td><td><a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/parsers/utils.py#L 89%"> 89%</a></td></tr><tr><td colspan="5"><b>data2rdf/pipelines</b></td></tr><tr><td>&nbsp; &nbsp;<a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/pipelines/__init__.py">__init__.py</a></td><td>2</td><td>0</td><td>100%</td><td>&nbsp;</td></tr><tr><td>&nbsp; &nbsp;<a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/pipelines/main.py">main.py</a></td><td>82</td><td>9</td><td>9</td><td><a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/pipelines/main.py#L 89%"> 89%</a></td></tr><tr><td colspan="5"><b>data2rdf/qudt</b></td></tr><tr><td>&nbsp; &nbsp;<a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/qudt/__init__.py">__init__.py</a></td><td>0</td><td>0</td><td>100%</td><td>&nbsp;</td></tr><tr><td>&nbsp; &nbsp;<a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/qudt/utils.py">utils.py</a></td><td>42</td><td>12</td><td>12</td><td><a href="https://github.com/MI-FraunhoferIWM/data2rdf/blob/main/data2rdf/qudt/utils.py#L 71%"> 71%</a></td></tr><tr><td><b>TOTAL</b></td><td><b>1245</b></td><td><b>145</b></td><td><b>88%</b></td><td>&nbsp;</td></tr></tbody></table></details>
 <!-- Pytest Coverage Comment:End -->
 
 # Installation
diff --git a/data2rdf/models/graph.py b/data2rdf/models/graph.py
index 29be3cd..4dbc212 100644
--- a/data2rdf/models/graph.py
+++ b/data2rdf/models/graph.py
@@ -14,6 +14,13 @@
     is_integer,
 )
 
+from data2rdf.models.utils import (  # isort:skip
+    apply_datatype,
+    detect_datatype,
+    is_float,
+    is_integer,
+)
+
 from data2rdf.models.base import (  # isort:skip
     BasicGraphModel,
     BasicSuffixModel,