fix: suppress false SCL003 warning for ARRAY[...] type constructor

VCI-exported .scl files use all-caps attribute names (EXTERNALACCESSIBLE,
EXTERNALVISIBLE, EXTERNALWRITABLE) which were not in the allowed list,
triggering spurious SCL005 warnings.

README.md

@@ -58,14 +58,25 @@ make test
 # or: lua src/main.lua --test
 ```
 
-### Mason Installation (Neovim)
+### Neovim + Mason (Recommended)
 
-For Neovim users, install via [mason.nvim](https://github.com/mason-org/mason.nvim) using a custom registry. See the [`tia-lsp.nvim` README](https://gitea.l-tech.rs/lazar/tia-lsp.nvim) for full setup instructions.
+The recommended way is via [mason.nvim](https://github.com/mason-org/mason.nvim) using the
+[`tia-mason-registry`](https://gitea.l-tech.rs/lazar/tia-mason-registry). See the
+[`tia-lsp.nvim` README](https://gitea.l-tech.rs/lazar/tia-lsp.nvim) for full step-by-step instructions.
 
-Quick summary:
-1. Add the `tia-mason-registry` as a lazy.nvim plugin
-2. Register it with mason: `registries = { "file:~/.local/share/nvim/lazy/tia-mason-registry", "github:mason-org/mason-registry" }`
-3. `:MasonInstall tia-lsp`
+### Manual Setup
+
+```bash
+# 1. Clone this repository
+git clone --depth 1 https://gitea.l-tech.rs/lazar/tia-lsp.git ~/tia-lsp
+
+# 2. Compile the tree-sitter parser
+cc -fPIC -I ~/tia-lsp/src/tree_sitter -c ~/tia-lsp/src/parser.c -o ~/tia-lsp/parser.o
+cc -shared ~/tia-lsp/parser.o -o ~/tia-lsp/parser.so
+
+# 3. Start the server (or configure your editor to run this)
+lua ~/tia-lsp/src/main.lua
+```
 
 ## External UDT Support
 

src/diagnostics.lua

@@ -106,6 +106,9 @@ function M.validate_diagnostics(content, workspace_types, root_dir)
       ExternalWRITABLE = true,  -- case variant
       ExternalVISIBLE = true,
       ExternalACCESSIBLE = true,
+      EXTERNALWRITABLE = true,  -- all-caps VCI export variant
+      EXTERNALVISIBLE = true,   -- all-caps VCI export variant
+      EXTERNALACCESSIBLE = true,-- all-caps VCI export variant
       S7_SetPoint = true,
       S7_Optimized_Access = true,
     }
@@ -215,8 +218,13 @@ function M.validate_diagnostics(content, workspace_types, root_dir)
           if type_part:match("%s+OF%s+") then
             base_type = type_part:match('.*%s+OF%s+"([^"]+)"') or type_part:match(".*%s+OF%s+([%w_]+)")
           end
+
+          local is_array_keyword = base_type and base_type:upper() == "ARRAY"
+              and type_part:match("^[Aa][Rr][Rr][Aa][Yy]%[")
+
           local upper_type = base_type and base_type:upper() or nil
           if base_type and base_type ~= "" and
+             not is_array_keyword and
              not all_types[base_type] and
              not builtin.is_known_data_type(upper_type) and
              not builtin.is_known_type_or_instruction(upper_type) then