Header

A header is a section of text or information at the beginning of a document, file, or other digital or physical object. It typically provides identifying details, such as a title, author, date, version number, or summary of the content that follows. In web development, a header can refer to the top section of a webpage, containing elements like the website's logo, navigation menu, and search bar. Headers can also appear in email messages or in printed documents like a letterhead or a book chapter header, and they can be used to describe the structure of a data file or a section of source code.

Header meaning with examples

• The project proposal began with a detailed header including the project's name, the submitting organization, the date, and a brief abstract to help orient the reader. This allowed reviewers to easily understand the scope. This was followed by the body containing the introduction, methodology, and other key components of the project in an easy-to-follow format.
• When designing the website, the developer paid special attention to the header, making sure it was visually appealing and user-friendly. The header featured the company's logo, a clear navigation menu linking to the different sections of the website, and a search bar so users could locate information, allowing visitors to explore the site with ease.
• In processing the data file, the program first reads the header to understand how the data is organized. The header contains essential information such as the number of data points, the format of the data, and the labels for each column. Without the header, interpreting the data would be extremely difficult. The metadata in the header ensures the rest of the data is correctly interpreted.
• Before sending the email, the email client included a header with the sender's and receiver's addresses, the subject line, the date, and other information. It also contained metadata, used to track the email's path through the Internet. Email headers play a role in filtering messages, since mail programs can check these values to determine whether to accept or reject a message.