Difference between revisions of "What Metadata Is"
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:'''[[Metadata]]'''. Data about other data. Since ''data'' is usually presented by a [[document]], ''metadata'' can be defined as a ''document'' that presents ''data'' about another ''document''. For instance, when one uploads a [[multimedia file]] up to a [[file-sharing system]], this ''system'' issues a [[system document]] that presents ''data'' from what [[user account]] the ''file'' is uploaded, its [[timestamp]] (when it is uploaded), what is its size, what is its title, category, and other tags that the uploading user and/or the ''system'' assigned to this ''file'', etc.<div style="background-color:#efefef; padding: 5px; margin: 15px;"> | :'''[[Metadata]]'''. Data about other data. Since ''data'' is usually presented by a [[document]], ''metadata'' can be defined as a ''document'' that presents ''data'' about another ''document''. For instance, when one uploads a [[multimedia file]] up to a [[file-sharing system]], this ''system'' issues a [[system document]] that presents ''data'' from what [[user account]] the ''file'' is uploaded, its [[timestamp]] (when it is uploaded), what is its size, what is its title, category, and other tags that the uploading user and/or the ''system'' assigned to this ''file'', etc.<div style="background-color:#efefef; padding: 5px; margin: 15px;"> | ||
| − | :*'''[[Timestamp]]'''. A character string or a sequence of encoded data that identifies when a certain event occurred. In [[information technology]], a ''timestamp'' is | + | :*'''[[Timestamp]]'''. A character string or a sequence of encoded data that identifies when a certain event occurred. In [[information technology]], a ''timestamp'' is highly likely an essential part of [[metadata]]. |
:*'''[[Metadata tag]]'''. A keyword, term, or phrase that a data owner assigns to the data. In [[information technology]], the data is presented by a [[computer file]] or another [[document]], so the ''tag'' enables keyword-based classification and used to categorize the content of that ''file'' or another ''document''.</div> | :*'''[[Metadata tag]]'''. A keyword, term, or phrase that a data owner assigns to the data. In [[information technology]], the data is presented by a [[computer file]] or another [[document]], so the ''tag'' enables keyword-based classification and used to categorize the content of that ''file'' or another ''document''.</div> | ||
Revision as of 01:56, 23 April 2020
What Metadata Is (hereinafter, the Lectio) is the lesson part of the CNM Tube Essentials lesson that introduces its participants to CNM Tube. This lesson belongs to the CNM Cyber for Competence session of the CNM Cyber Welcome Course.
Content
The predecessor lectio is Functions of CNM Tube.
Key terms
- Metadata. Data about other data. Since data is usually presented by a document, metadata can be defined as a document that presents data about another document. For instance, when one uploads a multimedia file up to a file-sharing system, this system issues a system document that presents data from what user account the file is uploaded, its timestamp (when it is uploaded), what is its size, what is its title, category, and other tags that the uploading user and/or the system assigned to this file, etc.
- Timestamp. A character string or a sequence of encoded data that identifies when a certain event occurred. In information technology, a timestamp is highly likely an essential part of metadata.
- Metadata tag. A keyword, term, or phrase that a data owner assigns to the data. In information technology, the data is presented by a computer file or another document, so the tag enables keyword-based classification and used to categorize the content of that file or another document.
Script
Tube at CNM Cyber is the successor lectio.
