Merge branch 'sverker/add-since-doc/OTP-15460' into maint

* sverker/add-since-doc/OTP-15460:
  Fill in since for multi-clause functions in erlang.erl
  Fix since attribute for troubled function docs
  Add empty 'since' attribute for old modules and functions
  Add since attribute to dtd
  Add "since" attributes in xml for new functions and modules
  erl_docgen: Generate "since" OTP version in html
  erl_interface: Fix doc for return type 'struct hostent'

1 files changed, 73 insertions, 73 deletions

diff --git a/lib/crypto/doc/src/crypto.xml b/lib/crypto/doc/src/crypto.xml
index b33db0d6e4..5c1909fc7f 100644
--- a/lib/crypto/doc/src/crypto.xml
+++ b/lib/crypto/doc/src/crypto.xml
@@ -23,7 +23,7 @@
 
     <title>crypto</title>
   </header>
-  <module>crypto</module>
+  <module since="">crypto</module>
   <modulesummary>Crypto Functions</modulesummary>
   <description>
     <p>This module provides a set of cryptographic functions.
@@ -524,7 +524,7 @@
   <!--================ FUNCTIONS ================-->
   <funcs>
     <func>
-      <name name="block_encrypt" arity="3"/>
+      <name name="block_encrypt" arity="3" since="OTP 18.0"/>
       <fsummary>Encrypt <c>PlainText</c> according to <c>Type</c> block cipher</fsummary>
       <desc>
 	<p>Encrypt <c>PlainText</c> according to <c>Type</c> block cipher.</p>
@@ -537,7 +537,7 @@
     </func>
 
     <func>
-      <name name="block_decrypt" arity="3"/>
+      <name name="block_decrypt" arity="3" since="OTP 18.0"/>
       <fsummary>Decrypt <c>CipherText</c> according to <c>Type</c> block cipher</fsummary>
       <desc>
         <p>Decrypt <c>CipherText</c> according to <c>Type</c> block cipher.</p>
@@ -550,9 +550,9 @@
     </func>
 
     <func>
-      <name>block_encrypt(Type, Key, Ivec, PlainText) -> CipherText</name>
-      <name>block_encrypt(AeadType, Key, Ivec, {AAD, PlainText}) -> {CipherText, CipherTag}</name>
-      <name>block_encrypt(aes_gcm | aes_ccm, Key, Ivec, {AAD, PlainText, TagLength}) -> {CipherText, CipherTag}</name>
+      <name since="OTP R16B01">block_encrypt(Type, Key, Ivec, PlainText) -> CipherText</name>
+      <name since="OTP R16B01">block_encrypt(AeadType, Key, Ivec, {AAD, PlainText}) -> {CipherText, CipherTag}</name>
+      <name since="OTP R16B01">block_encrypt(aes_gcm | aes_ccm, Key, Ivec, {AAD, PlainText, TagLength}) -> {CipherText, CipherTag}</name>
       <fsummary>Encrypt <c>PlainText</c> according to <c>Type</c> block cipher</fsummary>
       <type>
 	<v>Type = <seealso marker="#type-block_cipher_with_iv">block_cipher_with_iv()</seealso></v>
@@ -577,8 +577,8 @@
     </func>
 
     <func>
-      <name>block_decrypt(Type, Key, Ivec, CipherText) -> PlainText</name>
-      <name>block_decrypt(AeadType, Key, Ivec, {AAD, CipherText, CipherTag}) -> PlainText | error</name>
+      <name since="OTP R16B01">block_decrypt(Type, Key, Ivec, CipherText) -> PlainText</name>
+      <name since="OTP R16B01">block_decrypt(AeadType, Key, Ivec, {AAD, CipherText, CipherTag}) -> PlainText | error</name>
       <fsummary>Decrypt <c>CipherText</c> according to <c>Type</c> block cipher</fsummary>
       <type>
 	<v>Type = <seealso marker="#type-block_cipher_with_iv">block_cipher_with_iv()</seealso></v>
@@ -603,7 +603,7 @@
     </func>
 
      <func>
-      <name name="bytes_to_integer" arity="1"/>
+      <name name="bytes_to_integer" arity="1" since="OTP R16B01"/>
       <fsummary>Convert binary representation, of an integer, to an Erlang integer.</fsummary>
       <desc>
         <p>Convert binary representation, of an integer, to an Erlang integer.
@@ -612,7 +612,7 @@
     </func>
 
     <func>
-      <name name="compute_key" arity="4"/>
+      <name name="compute_key" arity="4" since="OTP R16B01"/>
       <fsummary>Computes the shared secret</fsummary>
       <desc>
 	<p>Computes the shared secret from the private key and the other party's public key.
@@ -622,7 +622,7 @@
     </func>
 
     <func>
-      <name name="exor" arity="2"/>
+      <name name="exor" arity="2" since=""/>
       <fsummary>XOR data</fsummary>
       <desc>
 	<p>Performs bit-wise XOR (exclusive or) on the data supplied.</p>
@@ -631,8 +631,8 @@
 
 
     <func>
-      <name name="generate_key" arity="2"/>
-      <name name="generate_key" arity="3"/>
+      <name name="generate_key" arity="2" since="OTP R16B01"/>
+      <name name="generate_key" arity="3" since="OTP R16B01"/>
       <fsummary>Generates a public key of type <c>Type</c></fsummary>
       <desc>
 	<p>Generates a public key of type <c>Type</c>.
@@ -653,7 +653,7 @@
     </func>
 
      <func>
-      <name name="hash" arity="2"/>
+      <name name="hash" arity="2" since="OTP R15B02"/>
       <fsummary></fsummary>
       <desc>
         <p>Computes a message digest of type <c>Type</c> from <c>Data</c>.</p>
@@ -663,7 +663,7 @@
     </func>
 
     <func>
-      <name name="hash_init" arity="1"/>
+      <name name="hash_init" arity="1" since="OTP R15B02"/>
       <fsummary></fsummary>
       <desc>
         <p>Initializes the context for streaming hash operations. <c>Type</c> determines
@@ -675,7 +675,7 @@
     </func>
 
     <func>
-      <name name="hash_update" arity="2"/>
+      <name name="hash_update" arity="2" since="OTP R15B02"/>
       <fsummary></fsummary>
       <desc>
         <p>Updates the digest represented by <c>Context</c> using the given <c>Data</c>. <c>Context</c>
@@ -687,7 +687,7 @@
     </func>
 
     <func>
-      <name name="hash_final" arity="1"/>
+      <name name="hash_final" arity="1" since="OTP R15B02"/>
       <fsummary></fsummary>
       <desc>
         <p>Finalizes the hash operation referenced by <c>Context</c> returned
@@ -698,8 +698,8 @@
     </func>
 
     <func>
-      <name name="hmac" arity="3"/>
-      <name name="hmac" arity="4"/>
+      <name name="hmac" arity="3" since="OTP R16B"/>
+      <name name="hmac" arity="4" since="OTP R16B"/>
       <fsummary></fsummary>
       <desc>
         <p>Computes a HMAC of type <c>Type</c> from <c>Data</c> using
@@ -709,7 +709,7 @@
     </func>
 
     <func>
-      <name name="hmac_init" arity="2"/>
+      <name name="hmac_init" arity="2" since="OTP R14B03"/>
       <fsummary></fsummary>
       <desc>
         <p>Initializes the context for streaming HMAC operations. <c>Type</c> determines
@@ -719,7 +719,7 @@
     </func>
 
     <func>
-      <name name="hmac_update" arity="2"/>
+      <name name="hmac_update" arity="2" since="OTP R14B03"/>
       <fsummary></fsummary>
       <desc>
         <p>Updates the HMAC represented by <c>Context</c> using the given <c>Data</c>. <c>Context</c>
@@ -738,7 +738,7 @@
     </func>
 
     <func>
-      <name name="hmac_final" arity="1"/>
+      <name name="hmac_final" arity="1" since="OTP R14B03"/>
       <fsummary></fsummary>
       <desc>
         <p>Finalizes the HMAC operation referenced by <c>Context</c>. The size of the resultant MAC is
@@ -747,7 +747,7 @@
     </func>
 
     <func>
-      <name name="hmac_final_n" arity="2"/>
+      <name name="hmac_final_n" arity="2" since="OTP R14B03"/>
       <fsummary></fsummary>
       <desc>
         <p>Finalizes the HMAC operation referenced by <c>Context</c>. <c>HashLen</c> must be greater than
@@ -756,8 +756,8 @@
     </func>
 
     <func>
-      <name name="cmac" arity="3"/>
-      <name name="cmac" arity="4"/>
+      <name name="cmac" arity="3" since="OTP 20.0"/>
+      <name name="cmac" arity="4" since="OTP 20.0"/>
       <fsummary>Calculates the Cipher-based Message Authentication Code.</fsummary>
       <desc>
         <p>Computes a CMAC of type <c>Type</c> from <c>Data</c> using
@@ -767,7 +767,7 @@
     </func>
 
     <func>
-      <name name="info_fips" arity="0"/>
+      <name name="info_fips" arity="0" since="OTP 20.0"/>
       <fsummary>Provides information about the FIPS operating status.</fsummary>
       <desc>
         <p>Provides information about the FIPS operating status of
@@ -790,7 +790,7 @@
     </func>
 
     <func>
-      <name name="enable_fips_mode" arity="1"/>
+      <name name="enable_fips_mode" arity="1" since="OTP 21.1"/>
       <fsummary>Change FIPS mode.</fsummary>
       <desc>
         <p>Enables (<c>Enable = true</c>) or disables (<c>Enable = false</c>) FIPS mode. Returns <c>true</c> if
@@ -805,7 +805,7 @@
     </func>
 
     <func>
-      <name name="info_lib" arity="0"/>
+      <name name="info_lib" arity="0" since=""/>
       <fsummary>Provides information about the libraries used by crypto.</fsummary>
       <desc>
         <p>Provides the name and version of the libraries used by crypto.</p>
@@ -826,7 +826,7 @@
     </func>
 
     <func>
-      <name name="mod_pow" arity="3"/>
+      <name name="mod_pow" arity="3" since="OTP R16B01"/>
       <fsummary>Computes the function: N^P mod M</fsummary>
       <desc>
 	<p>Computes the function <c>N^P mod M</c>.</p>
@@ -834,8 +834,8 @@
     </func>
 
     <func>
-      <name name="next_iv" arity="2"/>
-      <name name="next_iv" arity="3"/>
+      <name name="next_iv" arity="2" since="OTP R16B01"/>
+      <name name="next_iv" arity="3" since="OTP R16B01"/>
       <fsummary></fsummary>
       <desc>
 	<p>Returns the initialization vector to be used in the next
@@ -847,7 +847,7 @@
     </func>
 
     <func>
-      <name name="poly1305" arity="2"/>
+      <name name="poly1305" arity="2" since="OTP 21.1"/>
       <fsummary></fsummary>
       <desc>
         <p>Computes a POLY1305 message authentication code (<c>Mac</c>) from <c>Data</c> using
@@ -856,7 +856,7 @@
     </func>
 
     <func>
-      <name name="private_decrypt" arity="4"/>
+      <name name="private_decrypt" arity="4" since="OTP R16B01"/>
       <fsummary>Decrypts CipherText using the private Key.</fsummary>
       <desc>
 	<p>Decrypts the <c>CipherText</c>, encrypted with
@@ -870,7 +870,7 @@
     </func>
 
     <func>
-      <name name="private_encrypt" arity="4"/>
+      <name name="private_encrypt" arity="4" since="OTP R16B01"/>
       <fsummary>Encrypts PlainText using the private Key.</fsummary>
       <desc>
 	<p>Encrypts the <c>PlainText</c> using the <c>PrivateKey</c>
@@ -883,7 +883,7 @@
     </func>
 
     <func>
-      <name name="public_decrypt" arity="4"/>
+      <name name="public_decrypt" arity="4" since="OTP R16B01"/>
       <fsummary>Decrypts CipherText using the public Key.</fsummary>
       <desc>
 	<p>Decrypts the <c>CipherText</c>, encrypted with
@@ -897,7 +897,7 @@
     </func>
 
     <func>
-      <name name="public_encrypt" arity="4"/>
+      <name name="public_encrypt" arity="4" since="OTP R16B01"/>
       <fsummary>Encrypts PlainText using the public Key.</fsummary>
       <desc>
 	<p>Encrypts the <c>PlainText</c> (message digest) using the <c>PublicKey</c>
@@ -909,7 +909,7 @@
     </func>
 
     <func>
-      <name name="rand_seed" arity="1"/>
+      <name name="rand_seed" arity="1" since="OTP 17.0"/>
       <fsummary>Set the seed for random bytes generation</fsummary>
       <desc>
         <p>Set the seed for PRNG to the given binary. This calls the
@@ -922,7 +922,7 @@
     </func>
 
      <func>
-      <name>rand_uniform(Lo, Hi) -> N</name>
+      <name since="">rand_uniform(Lo, Hi) -> N</name>
       <fsummary>Generate a random number</fsummary>
       <type>
         <v>Lo, Hi, N = integer()</v>
@@ -935,7 +935,7 @@
     </func>
 
     <func>
-      <name name="start" arity="0"/>
+      <name name="start" arity="0" since=""/>
       <fsummary> Equivalent to application:start(crypto). </fsummary>
       <desc>
         <p> Equivalent to application:start(crypto).</p>
@@ -943,7 +943,7 @@
     </func>
 
     <func>
-      <name name="stop" arity="0"/>
+      <name name="stop" arity="0" since=""/>
       <fsummary> Equivalent to application:stop(crypto).</fsummary>
       <desc>
         <p> Equivalent to application:stop(crypto).</p>
@@ -951,7 +951,7 @@
     </func>
 
     <func>
-      <name name="strong_rand_bytes" arity="1"/>
+      <name name="strong_rand_bytes" arity="1" since="OTP R14B03"/>
       <fsummary>Generate a binary of random bytes</fsummary>
       <desc>
         <p>Generates N bytes randomly uniform 0..255, and returns the
@@ -964,7 +964,7 @@
     </func>
 
     <func>
-      <name name="rand_seed" arity="0"/>
+      <name name="rand_seed" arity="0" since="OTP 20.0"/>
       <fsummary>Strong random number generation plugin state</fsummary>
       <desc>
 	<p>
@@ -992,7 +992,7 @@ _FloatValue = rand:uniform().     % [0.0; 1.0[</pre>
     </func>
 
     <func>
-      <name name="rand_seed_s" arity="0"/>
+      <name name="rand_seed_s" arity="0" since="OTP 20.0"/>
       <fsummary>Strong random number generation plugin state</fsummary>
       <desc>
 	<p>
@@ -1027,7 +1027,7 @@ _FloatValue = rand:uniform().     % [0.0; 1.0[</pre>
     </func>
 
     <func>
-      <name>rand_seed_alg(Alg) -> rand:state()</name>
+      <name since="OTP 21.0">rand_seed_alg(Alg) -> rand:state()</name>
       <fsummary>Strong random number generation plugin state</fsummary>
       <type>
         <v>Alg = crypto | crypto_cache</v>
@@ -1063,7 +1063,7 @@ _FloatValue = rand:uniform().     % [0.0; 1.0[</pre>
     </func>
 
     <func>
-      <name>rand_seed_alg_s(Alg) -> rand:state()</name>
+      <name since="OTP 21.0">rand_seed_alg_s(Alg) -> rand:state()</name>
       <fsummary>Strong random number generation plugin state</fsummary>
       <type>
         <v>Alg = crypto | crypto_cache</v>
@@ -1121,7 +1121,7 @@ _FloatValue = rand:uniform().     % [0.0; 1.0[</pre>
     </func>
 
     <func>
-      <name name="stream_init" arity="2"/>
+      <name name="stream_init" arity="2" since="OTP R16B01"/>
       <fsummary></fsummary>
       <desc>
         <p>Initializes the state for use in RC4 stream encryption
@@ -1134,7 +1134,7 @@ _FloatValue = rand:uniform().     % [0.0; 1.0[</pre>
     </func>
 
    <func>
-      <name name="stream_init" arity="3"/>
+      <name name="stream_init" arity="3" since="OTP R16B01"/>
       <fsummary></fsummary>
       <desc>
         <p>Initializes the state for use in streaming AES encryption using Counter mode (CTR).
@@ -1149,7 +1149,7 @@ _FloatValue = rand:uniform().     % [0.0; 1.0[</pre>
     </func>
 
     <func>
-      <name name="stream_encrypt" arity="2"/>
+      <name name="stream_encrypt" arity="2" since="OTP R16B01"/>
       <fsummary></fsummary>
       <desc>
 	<p>Encrypts <c>PlainText</c> according to the stream cipher <c>Type</c> specified in stream_init/3.
@@ -1160,7 +1160,7 @@ _FloatValue = rand:uniform().     % [0.0; 1.0[</pre>
     </func>
 
     <func>
-      <name name="stream_decrypt" arity="2"/>
+      <name name="stream_decrypt" arity="2" since="OTP R16B01"/>
       <fsummary></fsummary>
       <desc>
 	<p>Decrypts <c>CipherText</c> according to the stream cipher <c>Type</c> specified in stream_init/3.
@@ -1171,7 +1171,7 @@ _FloatValue = rand:uniform().     % [0.0; 1.0[</pre>
     </func>
 
    <func>
-      <name name="supports" arity="0"/>
+      <name name="supports" arity="0" since="OTP R16B01"/>
       <fsummary>Provide a list of available crypto algorithms.</fsummary>
       <desc>
         <p> Can be used to determine which crypto algorithms that are supported
@@ -1183,7 +1183,7 @@ _FloatValue = rand:uniform().     % [0.0; 1.0[</pre>
     </func>
 
     <func>
-      <name name="ec_curves" arity="0"/>
+      <name name="ec_curves" arity="0" since="OTP 17.0"/>
       <fsummary>Provide a list of available named elliptic curves.</fsummary>
       <desc>
         <p>Can be used to determine which named elliptic curves are supported.</p>
@@ -1191,7 +1191,7 @@ _FloatValue = rand:uniform().     % [0.0; 1.0[</pre>
     </func>
 
     <func>
-      <name name="ec_curve" arity="1"/>
+      <name name="ec_curve" arity="1" since="OTP 17.0"/>
       <fsummary>Get the defining parameters of a elliptic curve.</fsummary>
       <desc>
         <p>Return the defining parameters of a elliptic curve.</p>
@@ -1199,8 +1199,8 @@ _FloatValue = rand:uniform().     % [0.0; 1.0[</pre>
     </func>
 
     <func>
-      <name name="sign" arity="4"/>
-      <name name="sign" arity="5"/>
+      <name name="sign" arity="4" since="OTP R16B01"/>
+      <name name="sign" arity="5" since="OTP 20.1"/>
       <fsummary> Create digital signature.</fsummary>
       <desc>
 	<p>Creates a digital signature.</p>
@@ -1214,8 +1214,8 @@ _FloatValue = rand:uniform().     % [0.0; 1.0[</pre>
     </func>
 
     <func>
-      <name name="verify" arity="5"/>
-      <name name="verify" arity="6"/>
+      <name name="verify" arity="5" since="OTP R16B01"/>
+      <name name="verify" arity="6" since="OTP 20.1"/>
       <fsummary>Verifies a digital signature.</fsummary>
       <desc>
 	<p>Verifies a digital signature</p>
@@ -1231,7 +1231,7 @@ _FloatValue = rand:uniform().     % [0.0; 1.0[</pre>
 
     <!-- Engine functions -->
     <func>
-      <name name="privkey_to_pubkey" arity="2"/>
+      <name name="privkey_to_pubkey" arity="2" since="OTP 20.2"/>
       <fsummary>Fetches a public key from an Engine stored private key.</fsummary>
       <desc>
 	<p>Fetches the corresponding public key from a private key stored in an Engine.
@@ -1241,7 +1241,7 @@ _FloatValue = rand:uniform().     % [0.0; 1.0[</pre>
     </func>
 
     <func>
-      <name name="engine_get_all_methods" arity="0"/>
+      <name name="engine_get_all_methods" arity="0" since="OTP 20.2"/>
       <fsummary>Return list of all possible engine methods</fsummary>
       <desc>
 	<p>
@@ -1259,7 +1259,7 @@ _FloatValue = rand:uniform().     % [0.0; 1.0[</pre>
     </func>
 
     <func>
-      <name name="engine_load" arity="3"/>
+      <name name="engine_load" arity="3" since="OTP 20.2"/>
       <fsummary>Dynamical load an encryption engine</fsummary>
       <desc>
 	<p>
@@ -1281,7 +1281,7 @@ _FloatValue = rand:uniform().     % [0.0; 1.0[</pre>
     </func>
 
     <func>
-      <name name="engine_load" arity="4"/>
+      <name name="engine_load" arity="4" since="OTP 20.2"/>
       <fsummary>Dynamical load an encryption engine</fsummary>
       <desc>
 	<p>
@@ -1301,7 +1301,7 @@ _FloatValue = rand:uniform().     % [0.0; 1.0[</pre>
     </func>
 
     <func>
-      <name name="engine_unload" arity="1"/>
+      <name name="engine_unload" arity="1" since="OTP 20.2"/>
       <fsummary>Dynamical load an encryption engine</fsummary>
       <desc>
 	<p>
@@ -1321,7 +1321,7 @@ _FloatValue = rand:uniform().     % [0.0; 1.0[</pre>
     </func>
 
     <func>
-      <name name="engine_by_id" arity="1"/>
+      <name name="engine_by_id" arity="1" since="OTP 21.0.6"/>
       <fsummary>Get a reference to an already loaded engine</fsummary>
       <desc>
 	<p>
@@ -1341,7 +1341,7 @@ _FloatValue = rand:uniform().     % [0.0; 1.0[</pre>
     </func>
 
     <func>
-      <name name="engine_ctrl_cmd_string" arity="3"/>
+      <name name="engine_ctrl_cmd_string" arity="3" since="OTP 20.2"/>
       <fsummary>Sends ctrl commands to an OpenSSL engine</fsummary>
       <desc>
 	<p>
@@ -1358,7 +1358,7 @@ _FloatValue = rand:uniform().     % [0.0; 1.0[</pre>
     </func>
 
     <func>
-      <name name="engine_ctrl_cmd_string" arity="4"/>
+      <name name="engine_ctrl_cmd_string" arity="4" since="OTP 20.2"/>
       <fsummary>Sends ctrl commands to an OpenSSL engine</fsummary>
       <desc>
 	<p>
@@ -1379,7 +1379,7 @@ _FloatValue = rand:uniform().     % [0.0; 1.0[</pre>
     </func>
 
     <func>
-      <name name="engine_add" arity="1"/>
+      <name name="engine_add" arity="1" since="OTP 21.0.6"/>
       <fsummary>Add engine to OpenSSL internal list</fsummary>
       <desc>
 	<p>Add the engine to OpenSSL's internal list.</p>
@@ -1392,7 +1392,7 @@ _FloatValue = rand:uniform().     % [0.0; 1.0[</pre>
     </func>
 
     <func>
-      <name name="engine_remove" arity="1"/>
+      <name name="engine_remove" arity="1" since="OTP 21.0.6"/>
       <fsummary>Remove engine to OpenSSL internal list</fsummary>
       <desc>
 	<p>Remove the engine from OpenSSL's internal list.</p>
@@ -1405,7 +1405,7 @@ _FloatValue = rand:uniform().     % [0.0; 1.0[</pre>
     </func>
 
     <func>
-      <name name="engine_get_id" arity="1"/>
+      <name name="engine_get_id" arity="1" since="OTP 21.0.6"/>
       <fsummary>Fetch engine ID</fsummary>
       <desc>
 	<p>Return the ID for the engine, or an empty binary if there is no id set.</p>
@@ -1418,7 +1418,7 @@ _FloatValue = rand:uniform().     % [0.0; 1.0[</pre>
     </func>
 
     <func>
-      <name name="engine_get_name" arity="1"/>
+      <name name="engine_get_name" arity="1" since="OTP 21.0.6"/>
       <fsummary>Fetch engine name</fsummary>
       <desc>
 	<p>Return the name (eg a description) for the engine, or an empty binary if there is no name set.</p>
@@ -1431,7 +1431,7 @@ _FloatValue = rand:uniform().     % [0.0; 1.0[</pre>
     </func>
 
     <func>
-      <name name="engine_list" arity="0"/>
+      <name name="engine_list" arity="0" since="OTP 20.2"/>
       <fsummary>List the known engine ids</fsummary>
       <desc>
 	<p>List the id's of all engines in OpenSSL's internal list.</p>
@@ -1451,7 +1451,7 @@ _FloatValue = rand:uniform().     % [0.0; 1.0[</pre>
     </func>
 
     <func>
-      <name name="ensure_engine_loaded" arity="2"/>
+      <name name="ensure_engine_loaded" arity="2" since="OTP 21.0.6"/>
       <fsummary>Ensure encryption engine just loaded once</fsummary>
       <desc>
 	<p>
@@ -1473,7 +1473,7 @@ _FloatValue = rand:uniform().     % [0.0; 1.0[</pre>
     </func>
 
     <func>
-      <name name="ensure_engine_loaded" arity="3"/>
+      <name name="ensure_engine_loaded" arity="3" since="OTP 21.0.6"/>
       <fsummary>Ensure encryption engine just loaded once</fsummary>
       <desc>
 	<p>
@@ -1496,7 +1496,7 @@ _FloatValue = rand:uniform().     % [0.0; 1.0[</pre>
     </func>
 
     <func>
-      <name name="ensure_engine_unloaded" arity="1"/>
+      <name name="ensure_engine_unloaded" arity="1" since="OTP 21.0.6"/>
       <fsummary>Unload an engine loaded with the ensure function</fsummary>
       <desc>
 	<p>
@@ -1519,7 +1519,7 @@ _FloatValue = rand:uniform().     % [0.0; 1.0[</pre>
     </func>
 
     <func>
-      <name name="ensure_engine_unloaded" arity="2"/>
+      <name name="ensure_engine_unloaded" arity="2" since="OTP 21.0.6"/>
       <fsummary>Unload an engine loaded with the ensure function</fsummary>
       <desc>
 	<p>