Glossario di termini Internet
If you are a newcomer to the Internet, you will be confronted with unfamiliar terms: browser, bookmark, e-mail, homepage, search engine, and many others. To make your first steps easier, this glossary explains some of the more important terminology you may find in the Internet, intranet, mail and news.
Short for Web-based Distributed Authoring and Versioning, an IETF standard set of platform-independent extensions to HTTP that allows users to collaboratively edit and manage files on remote Web servers. WebDAV features XML properties on metadata, locking - which prevents authors from overwriting each other's changes - namespace manipulation and remote file management. WebDav is sometimes referred to as DAV.
The Uniform Resource Locator (URL) displays the address of a document or a server in the Internet. The general structure of a URL varies according to type and is generally in the form Service://Hostname:Port/Path/Page#Mark although not all elements are always required. An URL can be a FTP address, a WWW (HTTP) address, a file address or an e-mail address.
HTML pages contain certain structural and formatting instructions called tags. Tags are code words enclosed by brackets in the document description language HTML. Many tags contain text or hyperlink references between the opening and closing brackets. For example, titles are marked by the tags
at the beginning and
at the end of the title. Some tags only appear on their own such as
for a line break or <img ...> to link a graphic.
A search engine is a service in the Internet based on a software program used to explore a vast amount of information using key words.
Server Side ImageMaps
Server Side ImageMaps appear for the reader as a picture or frame on the page. Click on the ImageMap with the mouse, and the coordinates of the relative position are sent to the server. Aided by an extra program, the server then determines the next step to take. There are several incompatible methods to define this process, the two most common being:
- W3C (CERN) HTTP Server (Format type: MAP - CERN)
- NCSA HTTP Server (Format type: MAP - NCSA)
LibreOffice creates ImageMaps for both methods. Select the format from the File type list in the Save As dialog in the ImageMap Editor. Separate Map Files are created which you must upload to the server. You will need to ask your provider or network administrator which type of ImageMaps are supported by the server and how to access the evaluation program.
SGML stands for "Standard Generalized Markup Language". SGML is based on the idea that documents have structural and other semantic elements that can be described without reference to how such elements should be displayed. The actual display of such a document may vary, depending on the output medium and style preferences. In structured texts, SGML not only defines structures (in the DTD = Document Type Definition) but also ensures they are consistently used.
HTML is a specialized application of SGML. This means that most Web browsers support only a limited range of SGML standards and that almost all SGML-enabled systems can produce attractive HTML pages.
A proxy is a computer in the network acting as a kind of clipboard for data transfer. Whenever you access the Internet from a company network and request a Web page that has already been read by a colleague, the proxy will be able to display the page much quicker, as long as it's still in the memory. All that has to be checked in this case is that the page stored in the proxy is the latest version. If this is the case, the page won't have to be downloaded from the much slower Internet but can be loaded directly from the proxy.
The Java programming language is a platform independent programming language that is especially suited for use in the Internet. Web pages and applications programmed with Java class files can be used on all modern operating systems. Programs using Java programming language are usually developed in a Java development environment and then compiled to a "byte code".
An ImageMap is a reference-sensitive graphic or text frame. You can click on defined areas of the graphic or text frame to go to a target (URL), which is linked with the area. The reference areas, along with the linked URLs and corresponding text displayed when resting the mouse pointer on these areas, are defined in the ImageMap Editor.
There are two different types of ImageMaps. A Client Side ImageMap is evaluated on the client computer, which loaded the graphic from the Internet, while a Server Side ImageMap is evaluated on the server computer which provides the HTML page on the Internet. In server evaluation, clicking an ImageMap sends the relative coordinates of the cursor within the image to the server, and a dedicated program on the server responds. In the client evaluation, clicking a defined hotspot of the ImageMap activates the URL, as if it were a normal text link. The URL appears below the mouse pointer when passing across the ImageMap.
As ImageMaps can be used in different ways, they can be stored in different formats.
ImageMaps are basically divided between those that are analyzed on the server (i. e. your Internet provider) and those analyzed on the web browser of the reader's computer.
Hyperlinks are cross-references, highlighted in text in various colors and activated by mouse-click. With the aid of hyperlinks, readers can jump to specific information within a document as well as to related information in other documents.
In LibreOffice you can assign hyperlinks to text as well as to graphics and text frames (see the Hyperlink Dialog icon on the Standard bar).
The Hypertext Transfer Protocol is a record of transmission of WWW documents between WWW servers (hosts) and browsers (clients).
HTML (Hypertext Markup Language) is a document code language, which is used as the file format for WWW documents. It is derived from SGML and integrates text, graphics, videos and sound.
If you want to type HTML commands directly, for example when doing exercises from one of the many available HTML books, remember that HTML pages are pure text files. Save your document under the document type Text and give it the file name extension .HTML. Be sure there are no umlauts or other special characters of the extended character set. If you want to re-open this file in LibreOffice and edit the HTML code, you must load it with the file type Text and not with the file type Web pages.
There are several references on the Internet providing an introduction to the HTML language.
FTP stands for File Transfer Protocol and is the standard transfer protocol for files in the Internet. An FTP server is a program on a computer connected to the Internet which stores files to be transmitted with the aid of FTP. While FTP is responsible for transmitting and downloading Internet files, HTTP (Hypertext Transfer Protocol) provides the connection setup and data transfer between WWW servers and clients.
Frames are useful for designing the layout of HTML pages. LibreOffice uses floating frames into which you can place objects such as graphics, movie files and sound. The context menu of a frame shows the options for restoring or editing frame contents. Some of these commands are also listed in Edit - Object when the frame is selected.
Client Side ImageMap
The area of the picture or frame where the reader can click is indicated by the appearance of the linked URL when the mouse passes over the area. The ImageMap is stored in a layer below the picture and contains information about the referenced regions. The only disadvantage of Client Side ImageMaps is that older Web browsers cannot read them; a disadvantage that will, however, resolve itself in time.
When saving the ImageMap, select the file type SIP - StarView ImageMap. This saves the ImageMap directly in a format which can be applied to every active picture or frame in your document. However, if you just want to use the ImageMap on the current picture or text frame, you do not have to save it in any special format. After defining the regions, simply click Apply. Nothing more is necessary. Client Side ImageMaps saved in HTML format are inserted directly into the page in HTML code.
The Content Management Interoperability Services (CMIS) standard defines a domain model and Web Services and Restful AtomPub bindings that will enable greater interoperability of Enterprise Content Management (ECM) systems. CMIS uses Web services and Web 2.0 interfaces to enable rich information to be shared across Internet protocols in vendor-neutral formats, among document systems, publishers and repositories, within one enterprise and between companies.