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metadata/corpus-metadata.md

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+# Corpus Metadata
+
+- All notes in this Obsidian vault need metadata. 
+- These metadata need to follow the [obsidian-front-matter-syntax](obsidian-front-matter-syntax.md). 
+- Obsidian calls metadata variables 'Properties'
+- In this Corpus we use General properties (every note should have them) and Specific properties (depending on the kind of note, can be inferred from other properties)
+
+## General metadata
+
+### Notetype
+
+The `notetype` field will have one of the following values:
+- `guide`: guided, hands-on lessons, learning by doing, interactive lessons
+- `explanation`: background and context to the standards, paraphrases of the original standard texts, opinion, discussion, underlying principles, interpretation
+- `application`: steps to solve a specific, real-world problem. Implementing the standard in real world environments, implementation aids, implementation examples, templates, etc.
+- `reference`: for original standard texts, dictionaries, terms and definitions.
+- `other`: for all notes that, by there content, cannot be placed in one for the previous categories.
+
+Note:
+- Notes in the iso27DIY-gis/guide folder and subfolders are typically of the `guide` type.
+- Notes in iso27DIY-gis/reference and subfolders are typically of the `explanation` or `application` type.
+
+### Language
+For the `language` property we use the language code as defined in ISO 639-1.
+
+### Status
+As of yet, the only value defined for the `status` property is `active`.
+## Isotags
+The property `isotags`, of type list, allows any note to be linked to clauses and controls of the ISO 27001 / ISO 27002 standard, by the `id` property of the Original Standard Texts, found in `Corpus/Standards/ISO27x/OST/27001/EN` and `/Corpus/Standards/ISO27x/OST/27002/EN`, respectively.
+For example, a note that needs to be linked to ISO 27001 clause 5.2 Policy, will get a value of C.5.2 added to its `isotags` list. Likewise, a note that needs to be linked to ISO 27002 control 5.15 Access control, will get a value of A.5.15 added to its `isotags` list.
+## Metadata for ISO 27001 and 27002 Original Standard Texts
+- The original texts of the ISO 27001 and ISO 27002 standards can be found in the OST folder and subfolders. 
+- These notes are tagged with “sourcetext”. 
+- The body of these notes must never be changed!
+- Specific properties for ISO 27002 OST notes are deduced from chapter 4 of the standard ("Themes and Attributes"). They are: `theme`, `control_type`, `information_security_properties`, `cybersecurity_concepts`, `operational_capabilities`, and `security_domains`. 
+- For the possible values of these properties, see [themes-and-attributes-in-iso-27002](themes-and-attributes-in-iso-27002.md).
+