diff options
Diffstat (limited to 'doc/html/Tutor/crtgrpar.html')
-rw-r--r-- | doc/html/Tutor/crtgrpar.html | 229 |
1 files changed, 0 insertions, 229 deletions
diff --git a/doc/html/Tutor/crtgrpar.html b/doc/html/Tutor/crtgrpar.html deleted file mode 100644 index dfbf5ad..0000000 --- a/doc/html/Tutor/crtgrpar.html +++ /dev/null @@ -1,229 +0,0 @@ -<HTML><HEAD> -<TITLE>HDF5 Tutorial - Creating Groups using Absolute and Relative Names -</TITLE> -</HEAD> - -<body bgcolor="#ffffff"> - -<!-- BEGIN MAIN BODY --> - - - [ <A HREF="title.html"><I>HDF5 Tutorial Top</I></A> ] -<H1> -<BIG><BIG><BIG><FONT COLOR="#c101cd">Creating Groups Using -Absolute and Relative Names</FONT> -</BIG></BIG></BIG></H1> - -<hr noshade size=1> - -<BODY> -<H2>Contents:</H2> -<UL> - <LI> <A HREF="#def">Absolute vs. Relative Names</A> - <LI> Programming Example - <UL> - <LI> <A HREF="#desc">Description</A> - <LI> <A HREF="#rem">Remarks</A> - <LI> <A HREF="#fc">File Contents</A> - </UL> -</UL> -<HR> -<A NAME="def"> -<H2>Absolute vs. Relative Names</h2> -<P> -Recall that to create an HDF5 object, we have to specify the location where the -object is to be created. This location is determined by the identifier of an HDF5 -object and the name of the object to be created. The name of the created -object can be either an absolute name or a name relative to the specified -identifier. -In the previous example, we used the file identifier and the absolute name -<code>/MyGroup</code> to create a group. -<P> -In this section, we discuss HDF5 names and show how to use absolute and -relative names. - -<H3>Names</H3> - -HDF5 object names are a slash-separated list of components. There are few -restrictions on names: component names may be any length except zero and may -contain any character except slash (<code>/</code>) and the null terminator. -A full name -may be composed of any number of component names separated by slashes, with any -of the component names being the special name <code>.</code> (a dot or period). -A name which begins with a slash is an absolute name which is accessed -beginning with the root group of the file; -all other names are relative names and and the named object is -accessed beginning with the specified group. -Multiple consecutive slashes in a full name are treated as single slashes -and trailing slashes are not significant. A special case is the name <code>/</code> (or -equivalent) which refers to the root group. -<P> -Functions which operate on names generally take a location identifier, which -can be either a file identifier or a group identifier, and perform the lookup -with respect to that location. -Several possibilities are described in the following table: - -<center> -<table border="1" width=80% bordercolor="#000000" cellpadding="4"> - <tr bgcolor="#ffcc99" bordercolor="#FFFFFF"> - <td><b> Location Type </b></td> - <td><b>Object Name</b></td> - <td><b>Description</b></td> - </tr> - <tr bordercolor="#FFFFFF"> - <td bgcolor="#99cccc" height="22">File identifier</td> - <td height="22" bgcolor="#CCCCCC"> - <div align="center"><code>/foo/bar</code></div> - </td> - <td height="22">The object <code>bar</code> in group <code>foo</code> - in the root group. </td> - </tr> - <tr bordercolor="#FFFFFF"> - <td bgcolor="#99cccc">Group identifier </td> - <td bgcolor="#CCCCCC"> - <div align="center"><code>/foo/bar</code></div> - </td> - <td>The object <code>bar</code> in group <code>foo</code> in the - root group of the file containing the specified group. - In other words, the group identifier's only purpose is to - specify a file. </td> - </tr> - <tr bordercolor="#FFFFFF"> - <td bgcolor="#99cccc">File identifier</td> - <td bgcolor="#CCCCCC"> - <div align="center">/</div> - </td> - <td>The root group of the specified file.</td> - </tr> - <tr bordercolor="#FFFFFF"> - <td bgcolor="#99cccc">Group identifier</td> - <td bgcolor="#CCCCCC"> - <div align="center">/</div> - </td> - <td>The root group of the file containing the specified group.</td> - </tr> - <tr bordercolor="#FFFFFF"> - <td bgcolor="#99cccc">Group identifier</td> - <td bgcolor="#CCCCCC"> - <div align="center"><code>foo/bar</code></div> - </td> - <td>The object <code>bar</code> in group <code>foo</code> in - the specified group.</td> - </tr> - <tr bordercolor="#FFFFFF"> - <td bgcolor="#99cccc">File identifier</td> - <td bgcolor="#CCCCCC"> - <div align="center"><b>.</b></div> - </td> - <td>The root group of the file.</td> - </tr> - <tr bordercolor="#FFFFFF"> - <td bgcolor="#99cccc">Group identifier</td> - <td bgcolor="#CCCCCC"> - <div align="center"><b>.</b></div> - </td> - <td>The specified group.</td> - </tr> - <tr bordercolor="#FFFFFF"> - <td bgcolor="#99cccc">Other identifier</td> - <td bgcolor="#CCCCCC"> - <div align="center"><b>.</b></div> - </td> - <td>The specified object.</td> - </tr> -</table> -</center> - - -<P> -<H2> Programming Example</H2> -<A NAME="desc"> -<H3><U>Description</U></H3> -The following example code shows how to create groups using absolute -and relative names. It creates three groups: the first two groups are -created using the file identifier and the group absolute names while the -third group is created using a group identifier and a name relative -to the specified group. <BR> -<UL> -[ <A HREF="examples/h5_crtgrpar.c">C Example</A> ] - <code>h5_crtgrpar.c</code><BR> -[ <A HREF="examples/grpsexample.f90">Fortran Example</A> ] - <code>grpsexample.f90</code><BR> -[ <A HREF="examples/java/CreateGroupAR.java">Java Example</A> ] - <code>CreateGroupAR.java</code> -</UL> - -<B>NOTE:</B> To download a tar file of the examples, including a Makefile, -please go to the <A HREF="references.html">References</A> page. - - -<A NAME="rem"> -<H3><U>Remarks</U></H3> -<UL> -<LI><code>H5Gcreate</code>/<code>h5gcreate_f</code> creates a group at the - location specified by a location identifier and a name. - The location identifier can be a file identifier or a group identifier - and the name can be relative or absolute. -<P> -<LI>The first <code>H5Gcreate</code>/<code>h5gcreate_f</code> creates the group - <code>MyGroup</code> in the root group of the specified file. -<P> -<LI>The second <code>H5Gcreate</code>/<code>h5gcreate_f</code> creates the group - <code>Group_A</code> in the group <code>MyGroup</code> in the root group - of the specified file. Note that the parent group (<code>MyGroup</code>) - already exists. -<P> -<LI>The third <code>H5Gcreate</code>/<code>h5gcreate_f</code> creates the group - <code>Group_B</code> in the specified group. -</UL> -<A NAME="fc"> -<H3><U>File Contents</U></H3> -The file contents are shown below: -<P> -<B>Fig. 9.1</B> <I>The Contents of <code>groups.h5</code> - (<code>groupsf.h5</code> for FORTRAN)</I> -<P> -<!--<IMG src="groupsh5.jpg" width="285" height="383"></P> --> -<IMG src="img004.gif"></P> - - - <B> Fig. 9.2</B> <I><code>groups.h5</code> in DDL - (for FORTRAN, the name in the first line is <code>groupsf.h5</code>)</I> -<PRE> - - HDF5 "groups.h5" { - GROUP "/" { - GROUP "MyGroup" { - GROUP "Group_A" { - } - GROUP "Group_B" { - } - } - } - } - -</PRE> - -<!-- BEGIN FOOTER INFO --> - -<P><hr noshade size=1> -<font face="arial,helvetica" size="-1"> - <a href="http://www.ncsa.uiuc.edu/"><img border=0 -src="footer-ncsalogo.gif" - width=78 height=27 alt="NCSA"><br> - The National Center for Supercomputing Applications</A><br> - <a href="http://www.uiuc.edu/">University of Illinois - at Urbana-Champaign</a><br> - <br> -<!-- <A HREF="helpdesk.mail.html"> --> -<A HREF="mailto:hdfhelp@ncsa.uiuc.edu"> -hdfhelp@ncsa.uiuc.edu</A> -<br> -<BR> <H6>Last Modified: June 22, 2001</H6><BR> -<!-- modified by Barbara Jones - bljones@ncsa.uiuc.edu --> -</FONT> -<BR> -<!-- <A HREF="mailto:hdfhelp@ncsa.uiuc.edu"> --> - -</BODY> -</HTML> - - - |