What do you want to do?
In Navigation View, click Classifications, and click Source Classifications or Node Classifications.
Select the classification you want to update.
On the Home tab, in the Item group, click the Properties image.
The Classification Properties dialog box opens
Enter the name and description you want to use for the classification.
Click OK.
You can copy a classification (along with its attributes and attribute values) within the same classification folder. This can be useful when classifications share the same attributes—for example, the attributes age, sex and date of birth might be appropriate in a number of node classifications.
In List View, select the classification you want to copy.
On the Home tab, in the Clipboard group, click Copy.
Keyboard shortcut To copy, press CTRL+C.
In Navigation View, select the Classifications folder.
On the Home tab, in the Clipboard group, click the Paste image.
Keyboard shortcut To copy, press CTRL+V
NOTE
If two classifications are very similar you may decide to merge them. For example, since they share similar attributes, you could merge the respondent node classification into the person node classification.
CAUTION Merging source classifications can cause problems if you intend to export your bibliographical data to reference management tools such as EndNote, Zotero or RefWorks.
To merge classifications:
In List View, select the classifications you want to merge into a destination classification.
On the Home tab, in the Clipboard group, click Cut or Copy.
Keyboard shortcut To copy, press CTRL+C
Select the destination classification.
On the Home tab, in the Clipboard group, click Merge and then click Merge Into Selected Classification.
The Merge Classifications Options dialog box opens.
Select the check boxes for the required options:
Append attributes to add any attributes that do not exist in the destination classification.
Append attribute values for duplicate attributes, add any attribute values that do not already exist.
Reassign classified items to reassign sources or nodes to the new destination classification.
NOTE
Attributes are considered to be duplicates when they have the same name and data type.
You can also merge existing classifications into a new classification—on the Home tab, in the Clipboard group, click Merge and then click Merge Into New classification.
You cannot merge source and node classifications together.
CAUTION If you delete a classification that as been assigned to nodes or sources in your project, the sources/nodes are declassified and any attribute values you have set are lost. To see the nodes or sources assigned to a classification, double-click the classification (the classification sheet opens in Detail View).
Select the classification you want to delete.
On the Home tab, in the Editing group, click Delete.
Click Yes to confirm.
In Navigation View, click Classifications, and then click Source Classifications or Node Classifications.
In List View, select the classification.
On the Create tab, in the Classifications group, click Attribute.
The New Attribute dialog box opens
Enter a name for the attribute—for example, age.
(Optional) Enter a description.
In the Type list, select the data type for the attribute values. For example, the attribute values for location are alphanumeric so the data type is text. Refer to Valid data types for more information.
Click the Values tab, to add extra attribute values—by default there are only two attribute values (Unassigned and Not Applicable).
Click Add to create a new attribute value
Use the Sort or the Move Up and Move Down buttons to change the order of attribute values—refer to Reorder Attribute Values for more information.
Select the Default check box, to automatically assign this value when you add a node or source to the classification.
Click OK.
NOTE Any attributes you add to a source classification cannot be exported to reference management tools such as EndNote, Zotero and RefWorks. If you intend to export bibliographical data, we recommend that you use only attributes provided by default in the predefined bibliographical classifications.
CAUTION Removing attributes could result in the loss of data if the attribute values have been assigned to the sources or nodes in your project. To see if an attribute has been assigned to the nodes or sources in project, double-click to open the classification sheet.
In List View, select the attributes you want to remove—click the show icon 
to see the attributes for a classification.
On the Home tab, in the Editing group, click Delete.
Click Yes to confirm.
You can move the attributes in a classification—the order you define is reflected in the classification sheet and in charts and other visualizations. To reorder attributes:
In List View, expand the classification to display its attributes.
Select the attribute you want to move.
On the Layout tab, in the Rows & Columns group, click Move Up 
or Move Down 
.
Keyboard shortcut To move up, CTRL+SHIFT+U, to move down CTRL+SHIFT+D
You can copy attributes between classifications. For example, create the attributes age and sex for the classification Teachers and copy them to the classification for Students.
In List View, select the attributes you want to copy—click the show icon to see the attributes for a classification.
On the Home tab, in the Clipboard group, click Copy.
Keyboard shortcut To copy, press CTRL+C.
Select the classification you want to copy into.
On the Home tab, in the Clipboard group, click the Paste image.
Keyboard shortcut To copy, press CTRL+V
NOTE When you copy an attribute the attribute values, including the default settings, are also copied.
In List View select the attribute you want to edit—click the show icon to see the attributes for a classification.
On the Home tab, in the Item group, click the Properties image.
The Attribute Properties dialog box opens
Enter the new name and description for the attribute.
Click OK.
The attribute values for an attribute have a specific data type. For example, values for the attribute location might be rural, urban, suburban—since these are text-based values, the attribute's data type is text.
NVivo provides the following data types: text, integer, decimal, date/time, date, time, boolean—for more information refer to Valid data types.
CAUTION Attribute values that are not compatible with the new data type are removed. For example, if you change date/time to date, all time values are automatically removed—this could result in the loss of data if the attribute values have been assigned to the sources or nodes in your project.
In List View select the attribute you want to edit—click the show icon to see the attributes for a classification.
On the Home tab, in the Item group, click the Properties image.
The Attribute Properties dialog box opens
In the Type list, select the data type of the attribute values.
Click OK.
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