OPS-broken-links-fix - MicrosoftDocs/cpp-docs-pr (#5215)

* fixed some broken links

* fixed broken link_v2

* fixed a typo

* Reverted the reference to n2231

Author: PhilKang0704

docs/build/reference/winmd-generate-windows-metadata.md

@@ -24,7 +24,7 @@ The linker generates only the .winmd file, but not the binary executable file.
 
 ## Remarks
 
-The **/WINMD** linker option is used for UWP apps and Windows runtime components to control the creation of a Windows Runtime metadata (.winmd) file. A .winmd file is a kind of DLL that contains metadata for Windows runtime types and, in the case of runtime components, the implementations of those types. The metadata follows the [ECMA-335](https://www.ecma-international.org/publications/standards/Ecma-335.htm) standard.
+The **/WINMD** linker option is used for UWP apps and Windows runtime components to control the creation of a Windows Runtime metadata (.winmd) file. A .winmd file is a kind of DLL that contains metadata for Windows runtime types and, in the case of runtime components, the implementations of those types. The metadata follows the [ECMA-335](https://ecma-international.org/publications-and-standards/standards/ecma-335/) standard.
 
 By default, the output file name has the form *binaryname*.winmd. To specify a different file name, use the [/WINMDFILE](winmdfile-specify-winmd-file.md) option.
 

docs/cpp/identifiers-cpp.md

@@ -77,7 +77,7 @@ int main() {
 }
 ```
 
-The range of characters allowed in an identifier is less restrictive when compiling C++/CLI code. Identifiers in code compiled by using /clr should follow  [Standard ECMA-335: Common Language Infrastructure (CLI)](https://www.ecma-international.org/publications/standards/Ecma-335.htm).
+The range of characters allowed in an identifier is less restrictive when compiling C++/CLI code. Identifiers in code compiled by using /clr should follow  [Standard ECMA-335: Common Language Infrastructure (CLI)](https://ecma-international.org/publications-and-standards/standards/ecma-335/).
 
 **END Microsoft Specific**
 

docs/cross-platform/install-and-configure-tools-to-build-using-ios.md

@@ -26,7 +26,7 @@ To install and use the vcremote remote agent to develop code for iOS, you must f
 
    You can get a free account that allows sideloading apps to an iOS device for testing only but not for distribution.
 
-- [Xcode](https://developer.apple.com/xcode/downloads/) version 10.2.1 or later
+- [Xcode](https://apps.apple.com/us/app/xcode/id497799835?mt=12/) version 10.2.1 or later
 
    Xcode can be downloaded from the App Store.
 

docs/error-messages/compiler-errors-2/compiler-error-c3872.md

@@ -12,7 +12,7 @@ ms.assetid: 519e95be-5641-40cc-894c-da4819506604
 
 The C++ compiler follows the C++11 standard on characters allowed in an identifier. Only certain ranges of characters and universal character names are allowed in an identifier. Additional restrictions apply to the initial character of an identifier. For more information and a list of allowed characters and universal character name ranges, see [Identifiers](../../cpp/identifiers-cpp.md).
 
-The range of characters allowed in an identifier is less restrictive when compiling C++/CLI code. Identifiers in code compiled by using /clr should follow  [Standard ECMA-335: Common Language Infrastructure (CLI)](https://www.ecma-international.org/publications/standards/Ecma-335.htm).
+The range of characters allowed in an identifier is less restrictive when compiling C++/CLI code. Identifiers in code compiled by using /clr should follow  [Standard ECMA-335: Common Language Infrastructure (CLI)](https://ecma-international.org/publications-and-standards/standards/ecma-335/).
 
 The following sample generates C3872:
 

docs/error-messages/compiler-errors-2/compiler-error-c3873.md

@@ -12,7 +12,7 @@ ms.assetid: e68fd3be-2391-492b-ac3f-d2428901b2e9
 
 The C++ compiler follows the C++11 standard on characters allowed in an identifier. Only certain ranges of characters and universal character names are allowed in an identifier. Additional restrictions apply to the initial character of an identifier. For more information and a list of allowed characters and universal character name ranges, see [Identifiers](../../cpp/identifiers-cpp.md).
 
-The range of characters allowed in an identifier is less restrictive when compiling C++/CLI code. Identifiers in code compiled by using /clr should follow  [Standard ECMA-335: Common Language Infrastructure (CLI)](https://www.ecma-international.org/publications/standards/Ecma-335.htm).
+The range of characters allowed in an identifier is less restrictive when compiling C++/CLI code. Identifiers in code compiled by using /clr should follow  [Standard ECMA-335: Common Language Infrastructure (CLI)](https://ecma-international.org/publications-and-standards/standards/ecma-335/).
 
 The following sample generates C3873:
 

docs/overview/cpp-conformance-improvements-2019.md

@@ -465,7 +465,7 @@ We fixed a minor type traits bug, where `add_const_t` and related functions are
 
 ### char8_t
 
-[P0482r6](https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0482r6.html). C++20 adds a new character type that is used to represent UTF-8 code units. `u8` string literals in C++20 have type `const char8_t[N]` instead of `const char[N]`, which was the case previously. Similar changes have been proposed for the C standard in [N2231](https://wg14.link/n2231). Suggestions for **`char8_t`** backward compatibility remediation are given in [P1423r3](https://wg21.link/p1423r3). The Microsoft C++ compiler adds support for **`char8_t`** in Visual Studio 2019 version 16.1 when you specify the [`/Zc:char8_t`](../build/reference/zc-char8-t.md) compiler option. It can be reverted to C++17 behavior via **`/Zc:char8_t-`**. The EDG compiler that powers IntelliSense doesn't yet support it in Visual Studio 2019 version 16.1. You may see spurious IntelliSense-only errors that don't affect the actual compilation.
+[P0482r6](https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0482r6.html). C++20 adds a new character type that is used to represent UTF-8 code units. `u8` string literals in C++20 have type `const char8_t[N]` instead of `const char[N]`, which was the case previously. Similar changes have been proposed for the C standard in [N2231](https://open-std.org/jtc1/sc22/wg14/www/docs/n2231.htm). Suggestions for **`char8_t`** backward compatibility remediation are given in [P1423r3](https://wg21.link/p1423r3). The Microsoft C++ compiler adds support for **`char8_t`** in Visual Studio 2019 version 16.1 when you specify the [`/Zc:char8_t`](../build/reference/zc-char8-t.md) compiler option. It can be reverted to C++17 behavior via **`/Zc:char8_t-`**. The EDG compiler that powers IntelliSense doesn't yet support it in Visual Studio 2019 version 16.1. You may see spurious IntelliSense-only errors that don't affect the actual compilation.
 
 #### Example