Logical objects, versions and language items
The content model of Tridion Docs has different levels: the logical level, the version level and the language level.
Every topic, map, Library Topic, binary item and image in Content Manager exists on three different levels:
- Logical level
- The logical object represents the most abstract level of the object. The logical object has an object title, a unique identifier (GUID) and a number of other metadata fields. The logical object contains one or more versions.
- Version level
- A version of an object represents one version or branch of the logical object. Logical objects can have any number of versions or branches. The version has a number, a Changes field and a number of other metadata fields. A version of an object contains one or more language items (or, if it's an image, one or more language-resolution combos).
- Language level
- A language item of a version of an object represents that version of the object in one language. Versions can have any number of language items.
For example, consider the following diagram, showing how the logo of a company called "Lixeneti" is represented in Publication Manager:

We see the following levels and objects:
- Logical level
- On the logical level at the top, there is the logical object that is (currently) called "Lixeneti logo." It has a title (which will never appear in published output) and a GUID. It represent the logo in the abstract, regardless of version or language or image resolution.
- Version level
- On the version level in the middle, we see two versions of the object, v1 and v2. Both versions have a Changes field explaining what is specific about this version of the object. We see that v1 represents the initial version of the logo, from a time when the company was called "Ardisher," while v2 represents the logo of the company after it was renamed to "Lixeneti."
- Language and resolution level
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On the language and resolution level at the bottom, each item corresponds to an actual piece of content, that is, an image file. We see that both versions of the image have four representations of the image:
- As a high-resolution US English image
- As a low-resolution US English image
- As a high-resolution Spanish image
- As a low-resolution Spanish image