a user makes a request or performs an action, the server handles the action, and then retrieves the
appropriate JSP to display the response in HTML. You can find documentation defining the JSP
1.2 specification, on which the LMS JSPs are based, at http://java.sun.com/products/jsp/.
The servers in the LMS application display their responses to requests differently. The Learning
Management System server displays its responses using either a popup JSP or a template JSP that
provides additional formatting to the page, called the adminTemplate.jsp. The Delivery server
displays its responses using a framing JSP called delivery.jsp. To step through the source code for
these pages, see “The Anatomy of a JSP.”
LMS JSP tag libraries
The servers that host the LMS application support custom JSP tags from multiple JSP tag
libraries. Each library has a tag library descriptor (TLD) file, which is an XML-formatted file that
defines the attributes of the JSP tags in the library and the Java classes to call when each tag is
encountered on a page.
The tag library descriptor files in the IBM Lotus LMS are named as follows:
IBM Lotus Learning Management System tag library descriptor files
Tag Library Name Purpose:
lms.tld Executes the basic functionality of the LMS application. Used by the JSPs in
every component of the LMS application.
Struts-bean.tld Calls JavaBeans™ from a JSP. Based on the Struts architecture.
Struts-html.tld Defines the basic HTML content of a JSP, such as button and checkbox elements.
Based on the Struts architecture.
Struts-logic.tld Incorporates common programmatic logic into a JSP. Based on the Struts
architecture.
The Delivery and Offline Learning Client servers contain the following TLD files in addition to those listed
above:
Tag Library Name Purpose:
chat.tld Executes the functionality used in conducting a live chat from within the
application.
delivery.tld Defines the functionality specific to the delivery and offline servers, such as the
activity and course tools.
delivery-js.tld Customizes the frames used to format the delivery and offline client
applications.
These TLD files are stored in the following directory:
[serverName]>WEB-INF>tld
where [serverName] is one of the following directory names:
• “LMM”: Represents the Learning Management System server
• “DS”: Represents the Delivery server
• “DUC”: Represents the Offline Learning Client server
The anatomy of a TLD file The tag library descriptor (TLD) file is a text file in XML format that defines the JSP tags used in
an application. In this section we will look at one such JSP tag. The url tag is a tag that references
a Uniform Resource Locator (URL). It belongs to the lms tag library and is defined in the lms.tld
file.
This section illustrates how to:
• Reference a tag in a JSP
• Define a tag in the TLD file
20 IBM Lotus Learning Management System Release 1 Customization Guide