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Chapter 4 Vdatas (VS API)

4.1 Chapter Overview
4.2 The Vdata Model
4.2.1 Records and Fields
4.3 The Vdata Interface
4.3.1 Header Files Used by the Vdata Interface
4.3.2 Vdata Library Routines
4.3.3 Identifying Vdatas in the Vdata Interface
4.3.4 Programming Model for the Vdata Interface
4.3.5 Accessing Files and Vdatas: Vstart and VSattach
4.3.6 Terminating Access to Vdatas and Files: VSdetach and Vend
4.4 Creating and Writing to Single-Field Vdatas: VHstoredata and VHstoredatam
4.5 Writing to Multi-Field Vdatas
4.5.1 Creating Vdatas
4.5.1.1 Assigning a Vdata Name and Class: VSsetname and VSsetclass
4.5.1.2 Defining a Field within a Vdata: VSfdefine
4.5.1.3 Initializing the Fields for Write Access: VSsetfields
4.5.1.4 Specifying the Interlace Mode: VSsetinterlace
4.5.2 Writing Data to Vdatas
4.5.2.1 Resetting the Current Position within Vdatas: VSseek
4.5.2.2 Writing to a Vdata: VSwrite
4.5.2.3 Packing or Unpacking Field Data: VSfpack
4.6 Reading from Vdatas
4.6.1 Initializing the Fields for Read Access: VSsetfields
4.6.2 Reading from the Current Vdata: VSread
4.7 Searching for Vdatas in a File
4.7.1 Finding All Vdatas that are Not Members of a Vgroup: VSlone
4.7.2 Sequentially Searching for a Vdata: VSgetid
4.7.3 Determining a Reference Number from a Vdata Name: VSfind
4.7.4 Searching for a Vdata by Field Name: VSfexist
4.8 Vdata Attributes
4.8.1 Querying the Index of a Vdata Field Given the Field Name: VSfindex
4.8.2 Setting the Attribute of a Vdata or Vdata Field: VSsetattr
4.8.3 Querying the Values of a Vdata or Vdata Field Attribute: VSgetattr
4.8.4 Querying the Total Number of Vdata and Vdata Field Attributes: VSnattrs
4.8.5 Querying the Number of Attributes of a Vdata or a Vdata Field: VSfnattrs
4.8.6 Retrieving the Index of a Vdata or Vdata Field Attribute Given the Attribute Name: VSfindattr
4.8.7 Querying Information on a Vdata or Vdata Field Attribute: VSattrinfo
4.8.8 Determining whether a Vdata Is an Attribute: VSisattr
4.9 Obtaining Information about a Specific Vdata
4.9.1 Obtaining Vdata Information: VSinquire
4.9.2 VSQuery Vdata Information Retrieval Routines
4.9.3 Other Vdata Information Retrieval Routines
4.9.4 VF Field Information Retrieval Routines


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HDF User's Guide - 05/19/99, NCSA HDF Development Group.