|
1
|
<!--
|
|
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: metacatload.html 2310 2004-09-21 09:01:22Z jones $'
|
|
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="./clientapi.html">Back</a> | <a href="./metacattour.html">Home</a> |
|
|
25
|
<a href="./metacatquery.html">Next</a>
|
|
26
|
</td>
|
|
27
|
</tr>
|
|
28
|
</table>
|
|
29
|
<P>Metacat provides functionality for inserting, updating, and deleting
|
|
30
|
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="./clientapi.html">Back</a> | <a href="./metacattour.html">Home</a> |
|
|
117
|
<a href="./metacatquery.html">Next</a>
|
|
118
|
|
|
119
|
</BODY>
|
|
120
|
</HTML>
|
|
121
|
|
