Info Catalog reftex: Reference Styles reftex: Labels and References

reftex: LaTeX xr Package

 
 3.7 ‘xr’: Cross-Document References
 ===================================
 
 The LaTeX package ‘xr’ makes it possible to create references to labels
 defined in external documents.  The preamble of a document using ‘xr’
 will contain something like this:
 
      \usepackage{xr}
      \externaldocument[V1-]{volume1}
      \externaldocument[V3-]{volume3}
 
 and we can make references to any labels defined in these external
 documents by using the prefixes ‘V1-’ and ‘V3-’, respectively.
 
    RefTeX can be used to create such references as well.  Start the
 referencing process normally, by pressing ‘C-c )’.  Select a label type
 if necessary.  When you see the label selection buffer, pressing ‘x’
 will switch to the label selection buffer of one of the external
 documents.  You may then select a label as before and RefTeX will insert
 it along with the required prefix.
 
    For this kind of inter-document cross-references, saving of parsing
 information and the use of multiple selection buffers can mean a large
 speed-up (Optimizations).
 

Info Catalog reftex: Reference Styles reftex: Labels and References