Data Exchange > Interface > Working with Data Exchange Formats > JT > About the Data Exchanged Between Creo and JT
About the Data Exchanged Between Creo and JT
You can import and export datum curves and datum points. You can export cable geometry to the JT format as facet or as facet and brep representations. However, when you import JT files, the cable geometry of the JT files is not recognized as cable entities.
You can also import and export the following non-geometric data:
Annotations that include 3D notes, dimensions, surface finish, geometric and dimensional tolerances, set datums, and symbols
The Product Manufacturing Information (PMI) of part and assembly level annotations such as notes and dimensions
Engineering meta data as model parameters
The combined states of saved views and layer visibility
Exploded states with combined states in the Creo model
Colors assigned to the components of the assemblies and the part and assembly components of the sub-assemblies
You can import the annotations of parts and assemblies with PMI data, such as notes and dimensions, as semantic representations. You can export annotations as graphical and semantic representations. The semantic export of annotations includes dimensions and notes with Product Manufacturing Information (PMI) as structured data. You can set the Export part as model preference option in the JT export profile to the As Is and Tessellated value and select the Rich content export profile option under Annotations to include semantic content when you export annotations to the JT format. The geometric and datum references of the annotations are preserved during their semantic export. You can also export annotations as display data. When you graphically export annotations, especially geometric and dimensional tolerances, they are represented as polylines.
The annotations of assemblies are exported as TrueType fonts to JT. The outlines of the true-type text fonts are extracted as closed-loop polylines during the export of annotations. Geometric and dimensional tolerances are exported to the JT format as a set of stroked or exploded graphical representations and are imported as annotations. The model parameters of parts and assemblies are exported as JT attributes and imported as model parameters. Parameters can include the designated engineering metadata of parts, components, and assemblies as user-defined parameters. If you select the Designated only option of Parameters in the JT export profile, you can export the designated parameters to JT. Creo assigns unit-type meters to JT models without units.
As annotations are associated with the saved views and the layer visibility states of the native parts and assemblies, the combined states of views and layer visibility are automatically exported when you export annotations. You can hide, unhide, or isolate layers and use the View Manager to create or change the layer visibility states of the native models. The combined states of views and layers in the native parts and assemblies are exported by default as model views to the JT format. You can also import the view states of the JT part and assembly models to create combined states. The view states include cross-sections, annotations, and geometry. The cross-sections of parts and assemblies are included in the combined states for visualization purpose. The cross-sections defined in the combined views are exported to the model views in JT.
You must select the Explode state option and set Export brep as to xtbrep or jtbrep in the JT export profile to export the exploded states of Creo models with their combined state views as semantic representations to the JT format. The saved views with which the exploded states are associated are also exported to JT. The component-level exploded states of assemblies are exported and the components are properly placed in the exploded states after export. If the exploded states are not associated with combined state views, Creo does not export the exploded states to the JT format.
You can import and export planar and zonal cross-sections of parts and assemblies. When you export a part with zonal cross-sections, multiple cross-sections are created and added to the model views in JT. The import and export of planar cross-sections include cross-hatch patterns that are attached to the cross-section geometry. Colors assigned to the cross-hatch patterns, including the hatching solid fill color, are part of the import and export.
The colors of cosmetic sketch features on the surfaces of parts, regular sketch features, and datum curves are retained during the export of Creo models to the JT format. Color import includes the colors that are assigned directly and indirectly to the part and assembly components of the sub-assemblies. However, the colors of the part and sub-assembly components that are intersected by assembly features such as cuts and holes are not exported to JT. The colors of the components of sub-assemblies with varied items called flexible components are also not exported to the JT format.
You can export a maximum of three levels of detail (LODs) from the native model files to the JT format for visualization purpose and import the highest LOD from the JT files. The data exchange also includes the brep facet geometry. You cannot include both the xt_brep and the jt_brep data structures in the same JT files after export. You must set the includeBrep option in the jt.config export configuration file to include or exclude the xt_brep or the jt_brep data structure in the exported files. The xt_brep data structure is imported only when it exists in the JT models. The jt_brep data structure is imported when the xt_brep data structure is not available in the imported files. The facet representation is imported when both the xt_brep and the jt_brep data structures are not available.