New module 'Content'
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sites/all/modules/cck/help/add-existing-field.html
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sites/all/modules/cck/help/add-existing-field.html
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<p>Using a field across several content type can be handy if a piece of data
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is relevant for several content types. A typical use case is a 'Phone number'
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field, used in both 'Restaurant' and 'Hotel' content types, even if hotels
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and restaurants are different enough to deserve their own specific set of
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fields and thus their own dedicated content types.</p>
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<p>When a field has been added to more than one content type, we also say it is
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"shared", and that it as "several instances".</p>
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<p>At the bottom of the <strong>Manage fields</strong> page for a content type,
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you'll find this:</p>
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<img src="&path&add-existing-field.png">
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<p>In order to add a new instance of an existing field to a content type, you
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need to provide the following information:</p>
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<dl>
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<dt><strong>Label:</strong></dt>
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<dd>
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A human-readable name for the field. It will be used in input forms and
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on displayed content.<br/>
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All characters are allowed, including spaces, accentuated or non-european
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characters.<br/>
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</dd>
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<dt><strong>Field:</strong></dt>
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<dd>
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The field to be shared.<br/>
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A field cannot appear more than once in each content type. Thus, only
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fields that are not already present in the current content type will be
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proposed as "shareable". If none, the <strong>Add existing field</strong>
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option is not available on the <strong>Manage fields</strong> page for
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this content type.<br/>
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Selecting a field automatically populates the <strong>Label</strong> and
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<strong>Widget</strong> values with the ones used by the previous field
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instance, but you can change them if needed before submitting the form.
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</dd>
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<dt><strong>Widget:</strong></dt>
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<dd>
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The form element that will be used to input data for this field on
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content forms : text input, select list, etc...<br/>
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Each field type has its own list of available widgets. When selecting a
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field to share, the list of widgets you can select is automatically updated.
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</dd>
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</dl>
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