diff --git a/data.ttl b/data.ttl
index 8087bf8..2eb92ba 100644
--- a/data.ttl
+++ b/data.ttl
@@ -36,9 +36,9 @@ ont:cartesian_ax3_mm a geocrs:CartesianCS ;
     rdfs:label "Cartesian coordinate system with 3 axis in millimetre units"@en ;
     geopesg:asSVG "<svg width='400' height='250' viewbox='0 0 375 220'><defs><marker id='arrowhead' markerWidth='10' markerHeight='7' refX='0' refY='2' orient='auto'><polygon points='0 0, 4 2, 0 4' /></marker></defs><line x1='20' y1='200' x2='200' y2='200' stroke='red' stroke-width='5' marker-end='url(#arrowhead)'></line><text x='110' y='220' class='small'>X: Cartesian X Axis (om:millimetre)</text><line x1='20' y1='200' x2='20' y2='20' stroke='green' stroke-width='5' marker-end='url(#arrowhead)'></line><text x='35' y='20' class='small'>Y: Cartesian Y Axis (om:millimetre)</text><line x1='20' y1='200' x2='190' y2='30' stroke='blue' stroke-width='5' marker-end='url(#arrowhead)'></line><text x='210' y='25' class='small'>Z: Cartesian Z Axis (om:millimetre)</text></svg>"^^geopesg:svgLiteral ;
     geopesg:asWKT "CS[\"cartesian\",3],AXIS[\"X\", \"geocentricX\", ORDER[1],            LENGTHUNIT[\"millimetre\",1]        ],        AXIS[\"Y\", \"geocentricY\", ORDER[2],            LENGTHUNIT[\"millimetre\",1]        ],        AXIS[\"Z\", \"geocentricZ\", ORDER[3],            LENGTHUNIT[\"millimetre\",1]        ]]"^^<http://www.opengis.net/ont/geosparql/crs#wktLiteral> ;
-    geopesg:axis ars:cartesian_ax3_mm_axis1,
-        ars:cartesian_ax3_mm_axis2,
-        ars:cartesian_ax3_mm_axis3 .
+    geopesg:axis ont:cartesian_ax3_mm_axis1,
+        ont:cartesian_ax3_mm_axis2,
+        ont:cartesian_ax3_mm_axis3 .
 
 ont:cartesian_ax3_mm_axis1 a geocrs:CoordinateSystemAxis ;
     rdfs:label "Cartesian coordinate system with 3 axis in millimetre units: Axis 1"@en ;