Add semantic conventions for log_source attributes

Author: djaglowski

CHANGELOG.md

@@ -20,6 +20,9 @@ release.
 
 ### Logs
 
+- Add log_source attributes.
+  ([#2022](https://github.com/open-telemetry/opentelemetry-specification/pull/2022))
+
 ### Resource
 
 ### Semantic Conventions

spec-compliance-matrix.md

@@ -94,6 +94,12 @@ formats is required. Implementing more than one format is optional.
 |----------------------------------------------|--------|--|----|---|------|----|------|---|----|---|----|-----|
 |TBD|
 
+## Logs
+
+|Feature                                       |Optional|Collector|Go|Java|JS |Python|Ruby|Erlang|PHP|Rust|C++|.NET|Swift|
+|----------------------------------------------|--------|---------|--|----|---|------|----|------|---|----|---|----|-----|
+|TBD|
+
 ## Resource
 
 | Feature                                                                                                                                     | Optional | Go | Java | JS | Python | Ruby | Erlang | PHP | Rust | C++ | .NET | Swift |

specification/logs/semantic_conventions/sources.md

@@ -0,0 +1,27 @@
+# Semantic Conventions for Log Sources
+
+**Status**: [Experimental](../../document-status.md)
+
+This document describes attributes for log files in OpenTelemetry.
+
+<!-- Re-generate TOC with `markdown-toc --no-first-h1 -i` -->
+
+<!-- toc -->
+
+- [Log Sources](#log-sources)
+  * [File](#file)
+
+<!-- tocstop -->
+
+## Log Sources
+
+### File
+
+**Description:** A file from which logs were read.
+| Name            | Description                                        | Value Type | Attribute Key  | Attribute Values     |
+| ----------------| -----------                                        | ---------- | -------------- | -------------------- |
+| log_source.file | The basename of the file                           | string     | name           | (identifier)         |
+|                 | The full path to the file                          | string     | path           | (identifier)         |
+|                 | The basename of the file, with symlinks resolved   | string     | type           | (identifier)         |
+|                 | The full path to the file, with symlinks resolved  | string     | mode           | (identifier)         |
+|                 | If applicable, the stream associated with the file | string     | stream         | stdout, stderr       |