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diff --git a/spec/rtems/io/if/putk.yml b/spec/rtems/io/if/putk.yml
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+SPDX-License-Identifier: CC-BY-SA-4.0 OR BSD-2-Clause
+brief: |
+  Outputs the characters of the string and a newline character to the kernel
+  character output device.
+copyrights:
+- Copyright (C) 2021 embedded brains GmbH (http://www.embedded-brains.de)
+- Copyright (C) 2015 On-Line Applications Research Corporation (OAR)
+definition:
+  default:
+    attributes: null
+    body: null
+    params:
+    - const char *${.:/params[0]/name}
+    return: int
+  variants: []
+description: null
+enabled-by: true
+index-entries: []
+interface-type: function
+links:
+- role: interface-placement
+  uid: header-3
+- role: interface-ingroup
+  uid: group-3
+- role: constraint
+  uid: /constraint/directive-ctx-any
+- role: constraint
+  uid: /constraint/directive-no-preempt
+name: putk
+notes: |
+  The directive may be used to print debug and test information.  It uses
+  ${putc:/name} to output the characters.  This directive performs a character
+  translation from ``NL`` to ``CR`` followed by ``NR``.
+
+  If the kernel character output device is concurrently accessed, then
+  interleaved output may occur.
+params:
+- description: |
+    is the string to output.
+  dir: null
+  name: s
+return:
+  return: |
+    Returns the number of characters output to the kernel character output
+    device.
+  return-values: []
+type: interface