### Install DocumenterInterLinks via Julia package manager

Source: https://juliadocs.org/DocumenterInterLinks.jl

Add the package using the Julia package manager. The command is entered in the Julia REPL after pressing ']'.

```julia
] add DocumenterInterLinks
```

--------------------------------

### Basic @extref Syntax

Source: https://juliadocs.org/DocumenterInterLinks.jl

Examples of using @extref to create external links in Markdown, replacing the standard @ref syntax.

```markdown
* [`Documenter.makedocs`](@extref)
* [Documenter's `makedocs` function](@extref Documenter.makedocs)
* See the section about Documenter's [Writers](@extref).
```

--------------------------------

### Accessing an inventory via links dictionary

Source: https://juliadocs.org/DocumenterInterLinks.jl

Demonstrates accessing a specific inventory object from the links dictionary using its key.

```julia
links["sphinx"]
```

--------------------------------

### Inspecting InventoryItem Details

Source: https://juliadocs.org/DocumenterInterLinks.jl

Using DocInventories to inspect the structure of an InventoryItem, which reveals the domain and role information.

```julia
using DocInventories

DocInventories.show_full(links["Documenter"]["Documenter.makedocs"])
```

```text
InventoryItem(
  name="Documenter.makedocs",
  domain="jl",
  role="function",
  priority=1,
  uri="lib/public/#Documenter.makedocs",
  dispname="Documenter.makedocs"
)
```

--------------------------------

### Add DocumenterInterLinks to Project.toml

Source: https://juliadocs.org/DocumenterInterLinks.jl

Add the package UUID to the relevant Project.toml file, e.g., docs/Project.toml.

```toml
DocumenterInterLinks = "d12716ef-a0f6-4df4-a9f1-a5a34e75c656"
```

--------------------------------

### Structure of a DocInventories.Inventory object

Source: https://juliadocs.org/DocumenterInterLinks.jl

Shows the structure of an Inventory object, including project metadata and a list of InventoryItem entries.

```julia
Inventory(
 project="Sphinx",
 version="8.3.0",
 root_url="https://www.sphinx-doc.org/en/master/",
 items=[
  InventoryItem(":js:function:`\$.getJSON`" => "usage/domains/javascript.html#getJSON"),
  InventoryItem(":c:member:`@alias.data`" => "usage/domains/c.html#c.\$", dispname="[anonymous].data"),
  InventoryItem(":c:function:`@alias.f`" => "usage/domains/c.html#c.\$", dispname="[anonymous].f"),
  InventoryItem(":c:functionParam:`@alias.f.k`" => "usage/domains/c.html#c.@alias.f", dispname="[anonymous].f.k"),
  InventoryItem(":cpp:type:`CustomList`" => "tutorial/describing-code.html#_CPPv410\$"),
  ⋮ (1782 elements in total)
  InventoryItem(":std:event:`write-started`" => "extdev/event_callbacks.html#event-\$", priority=1),
  InventoryItem(":std:label:`writing-builders`" => "extdev/builderapi.html#\$", dispname="Builder API"),
  InventoryItem(":std:confval:`xml_pretty`" => "usage/configuration.html#confval-\$", priority=1),
  InventoryItem(":std:label:`xref`" => "usage/referencing.html#\$", dispname="Cross-references"),
  InventoryItem(":std:label:`xref-modifiers`" => "usage/referencing.html#\$"),
  InventoryItem(":std:label:`xref-syntax`" => "usage/referencing.html#\$", dispname="Syntax"),
 ]
)
```

--------------------------------

### Declare external projects with InterLinks

Source: https://juliadocs.org/DocumenterInterLinks.jl

Instantiate an InterLinks object in docs/make.jl to define external projects. Each entry maps a project name to a root URL, an inventory URL, or a tuple with root URL and inventory locations. The resulting links object must be passed to Documenter.makedocs via the plugins keyword.

```julia
using DocumenterInterLinks

links = InterLinks(
    "sphinx" => "https://www.sphinx-doc.org/en/master/",
    "matplotlib" => "https://matplotlib.org/3.7.3/objects.inv",
    "Julia" => (
        "https://docs.julialang.org/en/v1/",
        joinpath(@__DIR__, "inventories", "Julia.toml")
    ),
    "Documenter" => (
        "https://documenter.juliadocs.org/stable/",
        "https://documenter.juliadocs.org/stable/objects.inv",
        joinpath(@__DIR__, "inventories", "Documenter.toml")
    ),
);
```

--------------------------------

### Advanced @extref with Domains and Roles

Source: https://juliadocs.org/DocumenterInterLinks.jl

Using Sphinx-style domain and role syntax within @extref for disambiguation.

```markdown
* [`makedocs`](@extref :function:`Documenter.makedocs`)
* [`makedocs`](@extref :jl:function:`Documenter.makedocs`)
```

--------------------------------

### Disambiguating References with Inventory Names

Source: https://juliadocs.org/DocumenterInterLinks.jl

Specifying the inventory name within the @extref tag to clarify the target location.

```markdown
* See the section about Documenter's [Writers](@extref Documenter).
```

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