7 Location address module

7.2 Location source

The attribute form location source (locsrc) is used by all location address element forms. All location addresses address nodes by selecting them from a group of nodes addressed by another location address or by direct or implicit reference to a grove or groves. The attribute location source (locsrc) addresses, directly or indirectly, the location source for a location address. When explicit grove plans are supported, location address elements can refer to the grove plans to use for the location source groves (see 7.1.4.1 Grove Plan).

When a location source is omitted or the location source is a reference to a document, subdocument, or data entity, the location source is implied. The implied location source is specified by the implied location source attributes (see 7.3 Implied location source).

When the location source is a grove definition element, the location source is the grove root of the grove constructed as defined by the grove definition (see 7.1.4.4 Grove Definition Elements).

The attribute cannot construct grove (cantcnst) indicates the expected system response when the system is unable to construct primary groves from data addressed as the location source: either report an RHE ("error") or ignore the location address ("ignore").

                       <!-- Location Source -->
<![ %locsrc; [
<!attlist
-- locsrc --      -- Location source attributes --
                  -- Clause: 7.2 --
   (anchloc,dataloc,fcsloc,linkloc,listloc,nmlist,nmquery,nmsploc,
    pathloc,proploc,queryloc,relloc,treeloc)

   locsrc         -- location source --
      CDATA       -- Reference --
                  -- Constraint: References to entities are references
                     to roots of primary groves constructed from the
                     entities. --
      #IMPLIED

   cantcnst       -- Cannot construct grove from located data --
      NAME        -- Lextype: ("ERROR"|"IGNORE") --
      ERROR
>
]]><!-- locsrc -->

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