You can create a class system by copying an existing SDB_ENTERPRISE_CONTENT class system.
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Navigate to CMS > Manage Class Systems > Create Class Systems.
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In the CMS Class Systems grid, click Edit grid
.
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To add a new row, click Add row and then type the following values:
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Class System Code: RC_CONTENT
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Revision: 0
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Short Desc: RC Content
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Click Save grid
and then click Read-only grid 
to set the grid to read-only mode.
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Navigate to CMS > Manage Class Systems > Create Global Properties.
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In the CMS Global Properties grid, select all the SDB_ENTERPRISE_CONTENT class system rows, right-click and then click Copy.
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Select a row, right-click and click Paste.
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In the Class system- revision LOV, select RC_CONTENT for all the new rows (rows that you just copy-pasted).
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Click Save grid
and then click Read-only grid to set the grid to read-only mode.
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Navigate to CMS > CMS Component Manager.
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In the explorer, select RC_CONTENT Rev.1.
If you see the below error message, click Continue.
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Right-click in the explorer, click Manage Class and select Add Class.
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Select the Root Node check box and type the Class Name, Ctrl, Short Desc as shown in the following screen. Then click Save.
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Switch back to the SDB_ENTERPRISE_CONTENT from the Explorer drop-down.
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Expand SDB_ENTERPRISE_CONTENT. Right-click the STRUCTURE Node and select Copy.
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Switch back to RC_CONTENT from the Explorer drop-down.
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Right Click on the RC_CONTENT_ROOT node, click Edit and select Paste (Class) option.
This option will take some time depending on the amount of data.
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Expand the STRUCTURE node and review the data.
