Metadata and its types

What is metadata?

Metadata is data about data. In other words, it is information that is used to describe the data that is contained in a web page, document, or file. Metadata is a brief explanation or summary of data. Metadata represents the information used by every industry in many ways everywhere. It is used in information systems, social media, websites, software, music services, and online retailing.

A simple example of metadata: - Metadata for a document can include a collection of information such as the author (author), the size of the file, the date the document was created, and the keyword to describe the document. Artist name, album name, etc. can be taken in Metadata for a music file.

There are many types of metadata and are used to serve a wide range of purposes that can be broadly classified as business, technical or operational.

Descriptive metadata: Descriptive metadata includes title, subject, genre, author, and creation date.

Rights metadata : Rights metadata can include copyright status, rights holder or license terms.

Technical metadata : Technical metadata includes file type, size, creation date, time, and compression type. Technical metadata is also used for interoperability and digital object management.

Preservation metadata : In different navigations, it is used.

Markup languages ​​include metadata used for interoperability and navigation, properties of Markup languages ​​may include the date, list, heading, name, and paragraphs.

The metadata embedded in the website is important for the success of the site. It includes descriptions of websites, keywords, metatags, and more - all of which play a role in search results. & Nbsp; Some common metadata words used when creating a web page include meta title and meta description. The meta title briefly explains the topic of the page to the readers about what they will find on the page, they should open it. The meta description contains further information.

Both types of metadata are displayed on search engines for readers to get quick information about the page. Search engines use this information to group similar items together so that when you search for a specific keyword or group of keywords, the results Be relevant to your search. The metadata of a web page can also include the language that was written on the page, such as an HTML page.

online shopping sites and retailers use metadata to track consumers' activities, habits likes dislikes. Digital marketers follow every click and purchase of yours, storing information about you such as the type of device you use, your location, time of day, and any other data that you can collect legally.

With this information, they create a picture of your routine and interactions, your preferences, your associations, and your habits, and can use that picture to deliver your products to you. & Nbsp; Internet service providers, Governments, and anyone possibly using metadata from web pages, emails, and other places to monitor web activity. & Nbsp; Since metadata is a small representation of large data, this information can be searched And it can be filtered to get information about millions of users simultaneously and can track things like hate speech, threats, etc.

Every file you save on your computer contains some basic information about the file so that the operating system can understand how to deal with it. For example, in Windows, when you look at the properties of a file, you can explicitly specify the name of the file, the type of file, where the file is stored, when the file was created, and when it was last modified. , You can clearly see how much file is taking up space on the hard drive.

This information can be used by the operating system as well as other programs. For example, you can use the file search utility to quickly find files on your computer that were created shortly before today and that is larger than 3 MB.

Metadata is used in social media platforms suppose if you are looking for someone's profile on Facebook You can see a profile image and a brief description of the Facebook user.

In the world of database management, metadata can address the size and formatting of a data item and other attributes. It is necessary to interpret the contents of the data in the database. eXtensible Markup Language (XML) is a Markup Language that defines data objects using the metadata format.

For example, if you have a set of data with dates and names, you cannot know what the data is representing or what is described in columns and rows. With basic metadata such as column names, you can quickly look at the database and understand what a particular set of data is describing.

Metadata is data that describes data, but it is not data itself. The metadata is stored in a Microsoft Word document. Since metadata is not real data, it can usually be safely made public because it does not give access to raw data to anyone. For example, knowing summary details about a web page or video file is enough to understand what the file is but not enough to actually view the entire page or play the entire video.