| 1 |
878
|
berkley
|
<!--
|
| 2 |
|
|
* metacatload.html
|
| 3 |
|
|
*
|
| 4 |
|
|
* Authors: Jivka Bojilova
|
| 5 |
|
|
* Copyright: 2000 Regents of the University of California and the
|
| 6 |
|
|
* National Center for Ecological Analysis and Synthesis
|
| 7 |
|
|
* For Details: http://www.nceas.ucsb.edu/
|
| 8 |
|
|
* Created: 2000 April 5
|
| 9 |
|
|
* Version: 0.01
|
| 10 |
|
|
* File Info: '$Id$'
|
| 11 |
|
|
*
|
| 12 |
|
|
* October Meeting SDSC, 2000
|
| 13 |
|
|
-->
|
| 14 |
|
|
<HTML>
|
| 15 |
|
|
<HEAD>
|
| 16 |
|
|
<TITLE>Metacat</TITLE>
|
| 17 |
|
|
<link rel="stylesheet" type="text/css" href="@docrooturl@default.css">
|
| 18 |
|
|
</HEAD>
|
| 19 |
|
|
<BODY>
|
| 20 |
|
|
<table width="100%">
|
| 21 |
|
|
<tr>
|
| 22 |
|
|
<td class="tablehead" colspan="2"><p class="label">Document Loading</p></td>
|
| 23 |
|
|
<td class="tablehead" colspan="2" align="right">
|
| 24 |
|
|
<a href="./metacatdom.html">Back</a> | <a href="./metacattour.html">Home</a> |
|
| 25 |
|
|
<a href="./metacatquery.html">Next</a>
|
| 26 |
|
|
</td>
|
| 27 |
|
|
</tr>
|
| 28 |
|
|
</table>
|
| 29 |
881
|
berkley
|
<P>Metacat provides functionality for inserting, updating, and deleting
|
| 30 |
878
|
berkley
|
XML documents in the database. Inserted or updated documents are read, checked
|
| 31 |
|
|
for validity, decomposed into nodes and inserted into the db. Document validity
|
| 32 |
|
|
is checked if a valid DTD is provided.
|
| 33 |
|
|
<P> <img alt="architecture diagram of write action" src="metadatawrite.gif">
|
| 34 |
|
|
<P> <b>Operations</b>
|
| 35 |
|
|
<ul>
|
| 36 |
|
|
<li>INSERT - A new XML document is inserted into the DB with given unique
|
| 37 |
|
|
docid. The client must specify the docid.</li>
|
| 38 |
|
|
<li>UPDATE - A document is provided to update a document that already
|
| 39 |
|
|
has a valid docid. The original document is archived, then overwritten.</li>
|
| 40 |
|
|
<li>DELETE - Document is archived, and pointer in xml_documents is moved
|
| 41 |
|
|
to xml_revisions, efectively deleting the document from public view but
|
| 42 |
|
|
preserving the revision for the revision history.</li>
|
| 43 |
|
|
</ul>
|
| 44 |
|
|
|
| 45 |
|
|
<p>Insertions, updates and deletes are passed to Metacat as servlet parameters.
|
| 46 |
|
|
The following is an example of a web form that can perform these tasks.</p>
|
| 47 |
|
|
|
| 48 |
|
|
<pre>
|
| 49 |
|
|
<html>
|
| 50 |
|
|
<head>
|
| 51 |
|
|
<title>MetaCat</title>
|
| 52 |
|
|
<link rel="stylesheet" type="text/css" href="metacat/style/rowcol.css">
|
| 53 |
|
|
</head>
|
| 54 |
|
|
<body class="emlbody">
|
| 55 |
|
|
<b>MetaCat XML Loader</b>
|
| 56 |
|
|
<p>
|
| 57 |
|
|
Upload, Change, or Delete an XML document using this form.
|
| 58 |
|
|
</p>
|
| 59 |
|
|
<form action="http://dev.nceas.ucsb.edu/metacat/servlet/metacat" method="POST">
|
| 60 |
|
|
<strong>1. Choose an action: </strong>
|
| 61 |
|
|
<input type="radio" name="action" value="insert" checked> Insert
|
| 62 |
|
|
<input type="radio" name="action" value="update"> Update
|
| 63 |
|
|
<input type="radio" name="action" value="delete"> Delete
|
| 64 |
|
|
<input type="submit" value="Process Action">
|
| 65 |
|
|
<br />
|
| 66 |
|
|
<strong>2. Provide a Document ID </strong>
|
| 67 |
|
|
<input type="text" name="docid"> (optional for Insert)
|
| 68 |
|
|
<input type="checkbox" name="public" value="yes" checked><strong>Public Document</strong>
|
| 69 |
|
|
<br />
|
| 70 |
|
|
<strong>3. Provide XML text </strong> (not needed for Delete)
|
| 71 |
|
|
<textarea name="doctext" cols="65" rows="15"></textarea>
|
| 72 |
|
|
<strong>4. Provide DTD text for upload </strong> (optional; not needed for Delete)
|
| 73 |
|
|
<textarea name="dtdtext" cols="65" rows="15"></textarea>
|
| 74 |
|
|
</form>
|
| 75 |
|
|
</body>
|
| 76 |
|
|
</html>
|
| 77 |
|
|
</pre>
|
| 78 |
|
|
|
| 79 |
|
|
<p>Once inserted into the database, the document looks like the following:</p>
|
| 80 |
|
|
|
| 81 |
|
|
<PRE><b>SQL> select * from xml_nodes where docid='NCEAS:1'</b> <br>
|
| 82 |
|
|
NODEID NODEINDEX NODETYPE NODENAME NODEDATA PARENTNODEID ROOTNODEID DOCID
|
| 83 |
|
|
------ --------- ---------- --------------- ---------------------- ------------ ---------- -------
|
| 84 |
|
|
1 DOCUMENT eml-dataset 1 NCEAS:1
|
| 85 |
|
|
2 1 ELEMENT eml-dataset 1 1 NCEAS:1
|
| 86 |
|
|
3 1 TEXT 2 1 NCEAS:1
|
| 87 |
|
|
|
| 88 |
|
|
|
| 89 |
|
|
4 2 ELEMENT meta_file_id 2 1 NCEAS:1
|
| 90 |
|
|
5 1 TEXT NCEAS:1 4 1 NCEAS:1
|
| 91 |
|
|
6 3 TEXT 2 1 NCEAS:1
|
| 92 |
|
|
|
| 93 |
|
|
|
| 94 |
|
|
7 4 ELEMENT dataset_id 2 1 NCEAS:1
|
| 95 |
|
|
8 1 TEXT Dist.ssd01 7 1 NCEAS:1
|
| 96 |
|
|
9 5 TEXT 2 1 NCEAS:1
|
| 97 |
|
|
|
| 98 |
|
|
|
| 99 |
|
|
10 6 ELEMENT title 2 1 NCEAS:1
|
| 100 |
|
|
11 1 TEXT Insights on community 10 1 NCEAS:1
|
| 101 |
|
|
dynamics
|
| 102 |
|
|
|
| 103 |
|
|
12 7 TEXT 2 1 NCEAS:1
|
| 104 |
|
|
|
| 105 |
|
|
|
| 106 |
|
|
13 8 ELEMENT originator 2 1 NCEAS:1
|
| 107 |
|
|
14 1 ATTRIBUTE description Names and addresses of 13 1 NCEAS:1
|
| 108 |
|
|
principal investigator
|
| 109 |
|
|
</PRE>
|
| 110 |
|
|
|
| 111 |
|
|
<p>If you follow the parentnodeid pointers you can recontruct this document.
|
| 112 |
|
|
The <a href="./metacatdb.html">Metacat Database</a> section provides more details
|
| 113 |
|
|
on the storage of XML documents.</p>
|
| 114 |
|
|
|
| 115 |
|
|
<br>
|
| 116 |
|
|
<a href="./metacatdom.html">Back</a> | <a href="./metacattour.html">Home</a> |
|
| 117 |
|
|
<a href="./metacatquery.html">Next</a>
|
| 118 |
|
|
|
| 119 |
|
|
</BODY>
|
| 120 |
|
|
</HTML>
|