The Cross-Reference Compatibility charts beginning on Source: Text Document demonstrate the relationship between source-destination document file types and the linking mechanisms that can be used.
A cross-reference can be configured to use any one of four types of linking mechanisms to identify related documents. Linking mechanisms are based on the document from which the cross-reference will be initiated.
The four Linking Mechanisms are as follows:
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Keyword - can be used to configure cross-references from Image, Text, OLE, or HTML Forms based on Document Types on all supported platforms.
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Text - can be used to configure cross-references from Text-based Document Types.
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Image - can be used to configure cross-references from Image-based Document Types.
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Template - can be used to configure cross-references from Text-based Document Types.
Within the Linking mechanism, there are also options available based on the documents that will be retrieved from the initiated Cross-Reference (destination documents). For example, if the destination document is text, a cross-reference based on a text search is possible, even if the source document is image-based.