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Glossary of terms used in ArcIMS installation articles

Question

Glossary of terms used in ArcIMS installation articles

Answer

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A

aimsdefaults.properties - A file that contains all of the default site properties for an ArcIMS configuration.
ajp13 - A protocol that Tomcat uses to communicate with web servers.
Apache - Name of a free Web Server, which is used to serve and maintain Web sites.
Applet - A program written in the JavaTM programming language that can be included in an HTML page, much in the same way an image is included.
ArcIMS - A GIS solution that allows you to centrally build and deliver maps, data and tools over the Internet.
ArcIMS Application server - Handles the distribution of incoming requests. It track which ArcIMS services are running on which ArcIMS Spatial servers and passes a request to the appropriate spatial server.
ArcIMS Monitor - Tracks the state of the ArcIMS Spatial Server. Monitor restarts the ArcIMS services automatically by restarting the site configuration, stored in the sez files.
ArcIMS Tasker - Removes temporary image files generated by the Image services at a user-defined time interval.

B

C

CATALINA_HOME - The system environment variable that refers to the root location of a Tomcat 4.0.x installation.
Control Panel - Collection of tools used to change the appearance and functionality of the Windows operating system.

D

dll - A dynamically linked library, a file that is needed by Windows programs to extend functionality and perform tasks.
DNS Name - A name such as www.esri.com that is translated into an IP address which is used to specify a computer.

E

Environment variables - Used to associate drives, paths or files to symbolic names that can be recognized by Windows operating systems.
esrimap_prop - The configuration file for the ArcIMS servlet connector.

F

G

gnu - An organization that creates software. It was founded in 1984 to develop a free UNIX-like operating system and in the process has created many useful programs for many different operating systems.
gnuzip - A free compression utility used to compress files in the UNIX environment.

H

Host - A computer connected to a TCP/IP network inclucing the Internet. Each host has a unique IP address.
Hostname - The unique name given to a computer on a network; a DOS command that returns the host name of the computer.
HTTP (HyperText Transfer Protocol - a set of standards used by computers to transfer hypertext files (Web pages) over the Internet.
HTTPS (Secure Hypertext Transport Protocol) - See HTTP.
httpd.conf - The configuration file for the Apache Web server.

I

IIS (Internet Information Services) - A Web server program that comes on Windows Machines, distributed by Microsoft.
IIS Admin Service - Allows administration of Web and FTP services through the Internet Information Services snap-in.
iis_redirector.reg - A registry file used to enter the parameters stored in the worker and uriworkermap properties to the registry when configuring Tomcat with IIS.
IP address - A group of four numbers, separated by periods, used to identify a device connected to a TCP/IP network or the Internet (for example, 192.168.255.255)
iPlanet - A Web servier program, also referred to as Sun ONE (iPlanet), which is used to serve and maintain Web sites.
isapi_redirect.dll - See isapi_redirector.dll.
isapi_redirector.dll - A library created for Tomcat that extends the ability of IIS. When certain URLs are received, this dll will send the HTTP request to Tomcat and Tomcat will handle the request in place of IIS.

J

Jakarta-Tomcat - Name of a free Servlet Engine which can also act as a Web server.
Java - An object-oriented programming language developed by Sun Microsystems.
JAVA_HOME - System Environment variable that needs to be set after installing J2SDK. It references the installation directory of the J2SDK.
JavaScript - A scripting language used to add dynamic content to Web sites using HTML source code. JavaScript is independent of the Java programming language.
Java Plug-in - Software application used to extend the functionality of a Web browser by allowing it to view Java-based applets.
J2SDK (Java Software Development Kit) - A software development kit for creating and compiling Java programs.
jk_nt_service.exe - The executable file that installs Jakarta-Tomcat servlet engine as a Windows service. Associated with the 3.2.X series of Jakarta-Tomcat.
JRE (Java Runtime Environment) - An environment that executes Java programs.
JRun - A servlet engine developed by Macromedia.

K

L

M
Manager - A suite of Web pages that is used to author map configuration files, publish and administer ArcIMS services and designing Web pages. Manager resides on the Web server machine and can be accessed remotely.
Manager Applications - Refers to the standalone applications used to author map configuration files (Author), publish and administer ArcIMS services (Administrator) and designing Web pages (Designer).
Microsoft JavaVM - Also referred to as the Java Virtual Machine.
mod_jk.dll - A plug-in that handles the communication between Tomcat and Apache. When certian URLs are received, this dll will sent the HTTP request to Tomcat and Tomcat will handle the request in place of Apache.
mod_jk.conf - The configuration file used to configure Tomcat 4.0.5 servlet engine with the Apache 2.0.43 Web server.

N
nslookup - A program for determining which IP address a DNS name has been assigned.
NT - A Microsoft Windows operating system.

O
Oracle - The name of a Relational Database Management System (RDBMS).
Output - Directory in ArcIMS to which images get written for display in a browser.

P
Perl - A programming language used to run scripts.
ping - A network request sent to another computer that asks the recipient computer to respond. The request is commonly used as a test to determine if two computers can connect to each other.
Port - A number that is used to specify direct communication with a specific network application.
Port 80 - Default port on which most Web server programs run.
Port 8080 - the default port on which Jakarta Tomcat runs.

Q

R
registry - A database in Windows that stores all important settings for Windows and Windows programs.

S
Servlet Engine - The server-side applet used to extend Web servers with a common application programming interface (API) and allows them to process Java code.
Servlet Exec - The name of a Servlet Engine developed by New Atlanta.
Service Administrator - A Web-based administration application that allows users to manage ArcIMS and ArcSDE services remotely.
Services - A Windows process that continuously runs in the background and performs a specified operation at predefined times or in response to certain events.
SnoopServlet - The test that you can run with Tomcat to determine if Tomcat and IIS are communicating with each other properly.

T
TCP/IP (Transmission Control Protocol/Internet Protocol - The protocol governing communications between all computers on the Internet.
Tomcat – See “Jakarta-Tomcat”.
TOMCAT_HOME - The system environment variable that refers to the root location of a Tomcat 3.2.x installation.
tomcat-apache.conf - The configuration file used to configure Tomcat 3.2.x servlet engines with the Apache 1.3.2x Web server.
tomcatservice.exe - An executable file that installs Jakarta as a Windows service.
tomcat321service.bat - A batch file that installs Jakarta as a Windows service.
Tomcat Worker - A Tomcat instance that is waiting to execute servlets on behalf of a Web server.

U
UNC Path - Refers to a path using the Universal Naming Convention (UNC). For example, \\<machinename>\ArcIMS\Output.
uriworkermap.properties - A Properties file containing parameters for configuring the Tomcat servlet engine with the IIS Web server.

V
Virtual Directory - A named collection of files and sub-virtual directories available from a Web server. The virtual directory name is part of the URL and is usually based on a physical directory. For example, output is a virtual directory in the URL http://www.myorg.org/output/someimage.gif since within it is contained a file, someimage.gif.

W
Web site - A site (location) on the World Wide Web.
WebLogic - An Web Enterprise software program developed by BEA Systems. It functions as a Web server that does not require a servlet engine.
WebSphere - A Web Enterprise software program developed by IBM. It functions as a servlet engine and is used in conjunction with the HTTP server, included with WebSphere.
worker.properties - A Properties file containing parameters for configuring the Tomcat servlet engine with the Apache Web server.
workers.properties - A Properties file containing parameters for configuring the Tomcat servlet engine with the IIS Web server.
World Wide Web Publishing Service - The component of IIS that handles HTTP requests, usually requests for Web pages. There are other components of IIS, including an FTP Service, a Simple Mail Transport Protocol Service, and the IIS Admin Service.

X
XP - A Microsoft Windows operating system.

Y

Z
zip - a type of memory compression used to reduce the size of files.