Etiqueta (metadados)

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A “tag” in the context of metadados[2] is a keyword or term assigned to a piece of information, such as a digital image, a blogue[4] post, or a computador[3] file. This kind of tag serves many purposes like indicating ownership, defining boundaries, and aiding in the classification of information. Tags can take various forms, including words, images, or identifying marks. They can be implemented in a top-down or bottom-up manner, and the use of both hierarchical and non-hierarchical tagging can improve information retrieval. The concept of tagging has been around even before computers, but it has gained widespread popularity with the advent of social bookmarking[1] and social networking sites. In the digital world, tags are used in a variety of applications, from organizing blog content to enhancing search capabilities in web development. Certain types of tags, such as hashtags and knowledge tags, have unique uses and benefits. However, the use of tags also comes with challenges, such as dealing with homonyms, synonyms, and inflections.

Definições de termos
1. social bookmarking. Social bookmarking is an online service that allows individuals and organizations to store, categorize, and share internet bookmarks. Instead of saving bookmarks to a single device, users save them to a specific web-based service. These bookmarks can be tagged with descriptive words, allowing for easy organization and retrieval. Social bookmarking platforms offer various features like rating systems, comment sections, and networking options. Over time, users create a shared vocabulary or 'folksonomy.' While social bookmarking has various applications, from improving web search functionality to supporting educational engagement and research, it also presents certain challenges, like information overload and ensuring data privacy. Despite these challenges, it impacts web search and SEO strategies positively, enhancing online visibility and digital marketing efforts.
2. metadados. Metadados é um termo utilizado para descrever dados sobre dados. Fornecem informações essenciais sobre outros dados, facilitando o seu controlo, organização e compreensão. Existem diferentes tipos de metadados, incluindo metadados estruturais, que descrevem a estrutura dos objectos da base de dados, e metadados de orientação, utilizados para encontrar itens específicos através de palavras-chave. As categorias de metadados incluem metadados técnicos, comerciais e de processo. São utilizados em vários domínios, como as telecomunicações para análise de tráfego, nos governos para monitorização digital e para melhorar as experiências dos utilizadores em sítios Web. As normas para metadados são definidas por organizações como a ANSI e a ISO. As aplicações específicas de metadados podem ser encontradas em fotografia, vídeo e dados geoespaciais. Os metadados podem ser criados manualmente ou de forma automatizada, dependendo dos itens ou objectos de dados em questão.

In information systems, a tag é um keyword or term assigned to a piece of information (such as an Internet bookmark, multimedia, database record, ou computer file). This kind of metadados helps describe an item and allows it to be found again by browsing or searching. Tags are generally chosen informally and personally by the item's creator or by its viewer, depending on the system, although they may also be chosen from a controlled vocabulary.

A tag cloud with terms related to Web 2.0

Tagging was popularized by sítios Web associated with Web 2.0 and is an important feature of many Web 2.0 services. It is now also part of other database systems, desktop applicationse sistemas operativos.

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