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V - Vgroup Interface


Vaddtagref/vfadtr Inserts an object into a vgroup.
Vattach/vfatch Initiates access to a new or existing vgroup.
Vattrinfo/vfainfo Retrieves the name, data type, number of values, and value size of an attribute for a vgroup.
Vdelete/vdelete Remove a vgroup from a file.
Vdeletetagref/vfdtr Deletes an object from a vgroup.
Vdetach/vfdtch Terminates access to a vgroup.
Vend/vfend Terminates access to a vgroup and/or vdata interface.
Vfind/vfind Returns the reference number of a vgroup given its name.
Vfindattr/vffdatt Returns the index of a vgroup attribute given its name.
Vfindclass/vfndcls Returns the reference number of a vgroup specified by its class name.
Vflocate/vffloc Locates a vdata in a vgroup given a list of field names.
Vgetattr/vfgnatt/vfgcatt Retrieves the values of a vgroup attribute.
Vgetclass/vfgcls Retrieves the class name of a vgroup.
Vgetid/vfgid Returns the reference number of the next vgroup.
Vgetname/vfgnam Retrieves the name of a vgroup.
Vgetnext/vfgnxt Gets the reference number of the next member (vgroup or vdata only) of a vgroup.
Vgettagref/vfgttr Retrieves the tag/reference number pair of an object given its index within a vgroup.
Vgettagrefs/vfgttrs Retrieves the tag/reference number pairs of the HDF objects belonging to a vgroup.
Vgetversion/vfgver Gets the version of a vgroup.
Vinqtagref/vfinqtr Checks whether an object belongs to a vgroup.
Vinquire/vfinq Retrieves the number of entries in a vgroup and its name.
Vinsert/vfinsrt Inserts a vdata or vgroup into a vgroup.
Visvg/vfisvg Determines whether an element of a vgroup is a vgroup and a member of another vgroup.
Visvs/vfisvs Determines whether a data object is a vdata within a vgroup.
Vlone/vflone Retrieves the reference numbers of lone vgroups, i.e., vgroups that are at the top of the grouping hierarchy, in a file.
Vnattrs/vfnatts Returns the number of attributes assigned to a vgroup.
Vnrefs/vnrefs Returns the number of tags of a given tag type in a vgroup.
Vntagrefs/vfntr Returns the number of objects in a vgroup.
Vsetattr/vfsnatt/vfscatt Attaches an attribute to a vgroup.
Vsetclass/vfscls Sets the class name of a vgroup.
Vsetname/vfsnam Sets the name of a vgroup.
Vstart/vfstart Initializes the vdata and/or vgroup interface.
VHmakegroup/vhfmkgp Creates a vgroup.
VQueryref/vqref Returns the reference number of a vgroup.
VQuerytag/vqtag Returns the tag of a vgroup.



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hdfhelp@ncsa.uiuc.edu
HDF Reference Manual - 07/29/98, NCSA HDF Development Group.