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@@ -1092,7 +1092,7 @@ ds.Class.query("info.coll[a].val != :1";0)
 You can use any letter from the alphabet as the `[a]` notation.
 
 
-#### Linking collection attribute query arguments
+### Linking collection attribute query arguments
 
 
 When searching within dataclass object attributes containing collections using multiple query arguments joined by the AND operator, you may want to make sure that only entities containing elements that match all arguments are returned, and not entities where arguments can be found in different elements. To do this, you need to link query arguments to collection elements, so that only single elements containing linked arguments are found.
@@ -1139,8 +1139,7 @@ With the above entities, if you write:
 ds.People.query("places.locations[a].kind= :1 and places.locations[a].city= :2";"home";"paris")
 ```
 
-... the query will only return "martin" because it has a "locations" element whose "kind" is "home" and whose "city" is "paris". The query will not return "smith" because the values "home" and "paris" are not in the same collection element.
-
+... the query will only return "martin" because it has a "locations" element whose "kind" is "home" and whose "city" is "paris". The query will not return "smith" because the values "home" and "paris" are not in the same collection element. 
 
 
 ### Queries in many-to-many relations
@@ -1304,6 +1303,8 @@ queryPath:
  steps:[{steps:[{description:[index : Company.revenues ] > 10000000,time:0,recordsfounds:933}]}]}]}]}
 ```
 
+### Examples
+
 #### Example 1
 
 This section provides various examples of queries.
 
@@ -28,7 +28,7 @@ Read [**What’s new in 4D 21 R2**](https://blog.4d.com/en-whats-new-in-4d-21-r2
 
 |Library|Current version|Updated in 4D|Comment|
 |---|---|---|----|
-|BoringSSL|fa47b1d|**21**|Used for QUIC|
+|BoringSSL|9b86817|**21 R2**|Used for QUIC|
 |CEF|7258|**21**|Chromium 139|
 |Hunspell|1.7.2|20|Used for spell checking in 4D forms and 4D Write Pro|
 |ICU|77.1|**21**|This upgrade forces an automatic rebuild of alphanumeric, text and object indexes.|
@@ -38,10 +38,9 @@ Read [**What’s new in 4D 21 R2**](https://blog.4d.com/en-whats-new-in-4d-21-r2
 |Libuv |1.51.0|**21**|Used for QUIC|
 |libZip|1.11.4|**21**|Used by zip class, 4D Write Pro, svg and serverNet components|
 |LZMA|5.8.1|**21**||
-|ngtcp2|1.16.0|**21**|Used for QUIC|
+|ngtcp2|1.18.0|**21 R2**|Used for QUIC|
 |OpenSSL|3.5.2|**21**||
 |PDFWriter|4.7.0|**21**|Used for [`WP Export document`](../WritePro/commands/wp-export-document.md) and [`WP Export variable`](../WritePro/commands/wp-export-variable.md) |
-|PHP|8.2.4|20||
 |SpreadJS|17.1.0|20 R7|See [this blog post](https://blog.4d.com/4d-view-pro-whats-new-in-4d-20-r7/) for an overview of the new features|
 |webKit|WKWebView|19||
 |Xerces|3.3.0|**21**|Used for XML commands|
 
@@ -25,9 +25,11 @@ The document can be located on the disk or on the Internet/Intranet.
 
 In the *document* parameter, you can pass:
 
-* either a standard complete pathname (of the type C:\\\\Folder\\\\File\\\\... under Windows and MacintoshHD:Folder:File under Mac OS),
-* or a Unix path under Mac OS (which must start with /).
+* either a standard complete pathname (of the type C:\\\\Folder\\\\File\\\\... under Windows and MacintoshHD:Folder:File under macOS),
+* or a Unix path under macOS (which must start with /).
 * or a network path of the type http://www.site.com/File or ftp://public.ftp.com...
+* or an empty string to display an Open File dialog box.
+
 
 The Boolean parameter *validation* indicates whether or not to validate the structure.