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Software development kit

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A software development kit (SDK) is a collection of software development tools in one installable package. They facilitate the creation of applications by having a compiler, debugger and sometimes a <a href="Software_framework" title="Software framework">software framework</a>. They are normally specific to a hardware platform and operating system combination. To create applications with advanced functionalities such as advertisements, push notifications, etc; most <a href="Application_software" title="Application software">application software</a> developers use specific software development kits.

Some SDKs are required for developing a platform-specific app. For example, the development of an Android app on the Java platform requires a <a href="Java_Development_Kit" title="Java Development Kit">Java Development Kit</a>. For iOS applications (apps) the <a href="IOS_SDK" title="IOS SDK">iOS SDK</a> is required. For Universal Windows Platform the <a href=".NET_Framework_SDK" class="mw-redirect" title=".NET Framework SDK">.NET Framework SDK</a> might be used. There are also SDKs that add additional features and can be installed in apps to provide analytics, data about application activity, and monetization options. Some prominent creators of these types of SDKs include Google, Smaato, InMobi, and Facebook.

<div class="mw-heading mw-heading2"><h2 id="Details">Details</h2></div>

An SDK can take the form of <a href="Application_programming_interface" class="mw-redirect" title="Application programming interface">application programming interfaces</a><a href="#cite_note-SandovalWhatIs16-1">[1]</a> in the form of on-device <a href="Library_(computing)" title="Library (computing)">libraries</a> of reusable functions used to interface to a particular <a href="Programming_language" title="Programming language">programming language</a>, or it may be as complex as hardware-specific tools that can communicate with a particular <a href="Embedded_system" title="Embedded system">embedded system</a>.<a href="#cite_note-BensoASoft00-2">[2]</a> Common <a href="Software_development_tool" class="mw-redirect" title="Software development tool">tools</a> include debugging facilities and other <a href="Utility_program" class="mw-redirect" title="Utility program">utilities</a>, often presented in an <a href="Integrated_development_environment" title="Integrated development environment">integrated development environment</a>.<a href="#cite_note-BurdAndroid15-3">[3]</a> SDKs may include sample software and/or technical notes along with documentation, and tutorials to help clarify points made by the primary reference material.<a href="#cite_note-AsifNext11-4">[4]</a><a href="#cite_note-WitheeSharePoint11-5">[5]</a>

SDKs often include <a href="License_compatibility" title="License compatibility">licenses</a> that make them unsuitable for building software intended to be developed under an incompatible license. For example, a proprietary SDK is generally incompatible with <a href="Free_software" title="Free software">free software</a> development, while a <a href="GNU_General_Public_License" title="GNU General Public License">GNU General Public License</a>'d SDK could be incompatible with proprietary software development, for legal reasons.<a href="#cite_note-Vaughan-NicholsNoGoogle13-6">[6]</a><a href="#cite_note-OrlandSonys17-7">[7]</a> However, SDKs built under the <a href="GNU_Lesser_General_Public_License" title="GNU Lesser General Public License">GNU Lesser General Public License</a> are typically usable for proprietary development.<a href="#cite_note-DavidsonAPrimer04-8">[8]</a><a href="#cite_note-9">[9]</a> In cases where the underlying technology is new, SDKs may include hardware. For example, <a href="AirTag_(company)" title="AirTag (company)">AirTag</a>'s 2012 <a href="Near-field_communication" title="Near-field communication">near-field communication</a> SDK included both the paying and the reading halves of the necessary hardware stack.<a href="#cite_note-10">[10]</a>

The average <a href="Android_(operating_system)" title="Android (operating system)">Android</a> <a href="Mobile_app" title="Mobile app">mobile app</a> implements 15.6 separate SDKs, with gaming apps implementing on average 17.5 different SDKs.<a href="#cite_note-SafeDK-11">[11]</a><a href="#cite_note-Fork.ai-12">[12]</a> The most popular SDK categories for Android mobile apps are analytics and advertising.<a href="#cite_note-Fork.ai-12">[12]</a>

SDKs can be unsafe (because they are implemented within apps yet run separate code). Malicious SDKs (with honest intentions or not) can violate users' <a href="Data_privacy" class="mw-redirect" title="Data privacy">data privacy</a>, damage app performance, or even cause apps to be banned from <a href="Google_Play" title="Google Play">Google Play</a> or the <a href="App_Store_(Apple)" title="App Store (Apple)">App Store</a>.<a href="#cite_note-TechCrunch-13">[13]</a> New technologies allow <a href="Programmer" title="Programmer">app developers</a> to control and monitor client SDKs in real time.

Providers of SDKs for specific systems or <a href="Subsystems" class="mw-redirect" title="Subsystems">subsystems</a> sometimes substitute a more specific term instead of software. For instance, both <a href="Microsoft" title="Microsoft">Microsoft</a><a href="#cite_note-MicrosoftWDK-14">[14]</a> and <a href="Citrix" class="mw-redirect" title="Citrix">Citrix</a><a href="#cite_note-CitrixDDK17-15">[15]</a> provide a driver development kit for developing <a href="Device_driver" title="Device driver">device drivers</a>.

<div class="mw-heading mw-heading2"><h2 id="Examples">Examples</h2></div>

Examples of software development kits for various platforms include:

<ul><li><a href="AmigaOS" title="AmigaOS">AmigaOS</a> NDK</li>

<li><a href="Android_NDK" title="Android NDK">Android NDK</a></li>

<li><a href="Java_Development_Kit" title="Java Development Kit">Java Development Kit</a></li>

<li><a href="Java_Web_Services_Development_Pack" title="Java Web Services Development Pack">Java Web Services Development Pack</a></li>

<li><a href="Microsoft_Windows_SDK" title="Microsoft Windows SDK">Microsoft Windows SDK</a></li>

<li><a href="VaxTele_SIP_Server_SDK" title="VaxTele SIP Server SDK">VaxTele SIP Server SDK</a></li>

<li><a href="Visage_SDK" title="Visage SDK">Visage SDK</a></li>

<li><a href="Vuforia_Augmented_Reality_SDK" title="Vuforia Augmented Reality SDK">Vuforia Augmented Reality SDK</a></li>

<li><a href="Windows_App_SDK" title="Windows App SDK">Windows App SDK</a></li>

<li><a href="Xbox_Development_Kit" title="Xbox Development Kit">Xbox Development Kit</a></li></ul>

<ul><li><a href="Game_development_kit" title="Game development kit">Game development kit</a></li>

<li><a href="Widget_toolkit" title="Widget toolkit">Widget toolkit</a></li></ul>

<div class="mw-heading mw-heading2"><h2 id="References">References</h2></div>

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</style><cite id="CITEREFSandoval,_K.2016" class="citation web cs1">Sandoval, K. (2 June 2016). <a rel="nofollow" class="external text" href="https://nordicapis.com/what-is-the-difference-between-an-api-and-an-sdk/">"What is the Difference Between an API and an SDK?"</a>. Nordic APIs Blog. Nordic APIs AB. Retrieved 5 July 2018.</cite>

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<li id="cite_note-BensoASoft00-2"><a href="#cite_ref-BensoASoft00_2-0">^</a> <cite id="CITEREFBenso,_A.Chiusano,_S.Prinetto,_P.2000" class="citation book cs1">Benso, A.; Chiusano, S.; Prinetto, P. (2000). "A software development kit for dependable applications in embedded systems". Proceedings International Test Conference 2000 (IEEE Cat. No.00CH37159). pp. 170–8. <a href="Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1109%2FTEST.2000.894204">10.1109/TEST.2000.894204</a>. <a href="ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <bdi>0-7803-6546-1</bdi>. <a href="S2CID_(identifier)" class="mw-redirect" title="S2CID (identifier)">S2CID</a> <a rel="nofollow" class="external text" href="https://api.semanticscholar.org/CorpusID:206679243">206679243</a>.</cite>

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<li id="cite_note-BurdAndroid15-3"><a href="#cite_ref-BurdAndroid15_3-0">^</a> <cite id="CITEREFBurd,_B.2015" class="citation book cs1">Burd, B. (2015). <a rel="nofollow" class="external text" href="https://books.google.com/books?id=fwElCgAAQBAJ&pg=PA31">Android Application Development All-in-One For Dummies</a>. John Wiley & Sons. p. 31. <a href="ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <bdi>9781118973806</bdi>.</cite>

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<li id="cite_note-AsifNext11-4"><a href="#cite_ref-AsifNext11_4-0">^</a> <cite id="CITEREFAsif,_S.Z.2011" class="citation book cs1">Asif, S.Z. (2011). <a rel="nofollow" class="external text" href="https://books.google.com/books?id=zgqQ4MX3uIUC&pg=PT384">Next Generation Mobile Communications Ecosystem: Technology Management for Mobile Communications</a>. John Wiley & Sons. p. PT384. <a href="ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <bdi>9781119995814</bdi>.</cite>

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<li id="cite_note-WitheeSharePoint11-5"><a href="#cite_ref-WitheeSharePoint11_5-0">^</a> <cite id="CITEREFWithee,_K.2011" class="citation book cs1">Withee, K. (2011). <a rel="nofollow" class="external text" href="https://books.google.com/books?id=_OiEGA2EZz8C&pg=PT346">SharePoint 2010 Development For Dummies</a>. John Wiley & Sons. p. PT346. <a href="ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <bdi>9781118038628</bdi>.</cite>

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<li id="cite_note-Vaughan-NicholsNoGoogle13-6"><a href="#cite_ref-Vaughan-NicholsNoGoogle13_6-0">^</a> <cite id="CITEREFVaughan-Nichols,_S.J.2013" class="citation web cs1">Vaughan-Nichols, S.J. (4 January 2013). <a rel="nofollow" class="external text" href="https://www.zdnet.com/article/no-google-is-not-making-the-android-sdk-proprietary-whats-the-fuss-about/">"No, Google is not making the Android SDK proprietary. What's the fuss about?"</a>. ZDNet. CBS Interactive. Retrieved 5 July 2018.</cite>

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<li id="cite_note-OrlandSonys17-7"><a href="#cite_ref-OrlandSonys17_7-0">^</a> <cite id="CITEREFOrland,_K.2017" class="citation web cs1">Orland, K. (20 July 2017). <a rel="nofollow" class="external text" href="https://arstechnica.com/gaming/2017/07/sony-using-copyright-requests-to-remove-leaked-ps4-sdk-from-the-web/">"Sony's legal quest to remove its leaked developer's kit from the Web"</a>. ArsTechnica. Condé Nast. Retrieved 5 July 2018.</cite>

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<li id="cite_note-DavidsonAPrimer04-8"><a href="#cite_ref-DavidsonAPrimer04_8-0">^</a> <cite id="CITEREFDavidson,_S.J.2004" class="citation web cs1">Davidson, S.J. (2004). <a rel="nofollow" class="external text" href="http://www.wipo.int/sme/en/documents/opensource_software_primer_fulltext.html">"A Primer on Open Source Software for Business People and Lawyers"</a>. Leonard, Street and Deinard. Retrieved 5 July 2018.</cite>

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<li id="cite_note-9"><a href="#cite_ref-9">^</a> <cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.wipo.int/edocs/mdocs/copyright/en/wipo_ip_cm_07/wipo_ip_cm_07_www_82575.pdf">"OPEN SOURCE AND COMMERCIAL SOFTWARE : AN IN-DEPTH ANALYSIS OF THE ISSUES"</a> (PDF). wipo.int.</cite>

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<li id="cite_note-10"><a href="#cite_ref-10">^</a> <cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://venturebeat.com/2012/10/16/airtag-releasing-nfc-mobile-payments-developer-kit-wishes-apple-would-help-simply-the-ecosystem/">"Airtag releasing NFC mobile payments developer kit, wishes Apple would help simplify the ecosystem"</a>. 16 October 2012.</cite>

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<li id="cite_note-SafeDK-11"><a href="#cite_ref-SafeDK_11-0">^</a> <cite id="CITEREFShoavi" class="citation web cs1">Shoavi, Orly. <a rel="nofollow" class="external text" href="http://blog.safedk.com/sdk-economy/star-winners-mobile-app-tools-sdks/">"The All-Star Winners of Mobile App Tools (SDKs)"</a>. SafeDK.</cite>

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<li id="cite_note-Fork.ai-12">^ <a href="#cite_ref-Fork.ai_12-0">a</a> <a href="#cite_ref-Fork.ai_12-1">b</a> <cite id="CITEREFLishi" class="citation web cs1">Lishi, He. <a rel="nofollow" class="external text" href="https://fork.ai/technologies">"All iOS and Android 3rd Platform SDKs"</a>. Fork.ai.</cite>

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<li id="cite_note-TechCrunch-13"><a href="#cite_ref-TechCrunch_13-0">^</a> <cite id="CITEREFPerez2015" class="citation web cs1">Perez, Sarah (19 October 2015). <a rel="nofollow" class="external text" href="https://techcrunch.com/2015/10/19/hundreds-of-apps-banned-from-app-store-for-accessing-users-personal-information/">"Hundreds Of Apps Banned From App Store For Accessing Users' Personal Information"</a>. TechCrunch.</cite>

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<li id="cite_note-MicrosoftWDK-14"><a href="#cite_ref-MicrosoftWDK_14-0">^</a> <cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://docs.microsoft.com/en-us/windows-hardware/drivers/index">"Windows Driver Kit documentation"</a>. Hardware Dev Center. Microsoft. Retrieved 5 July 2018.</cite>

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<li id="cite_note-CitrixDDK17-15"><a href="#cite_ref-CitrixDDK17_15-0">^</a> <cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://support.citrix.com/article/CTX224947">"Driver Development Kit - For XenServer 6.2.0 Service Pack 1 with Hotfix XS62ESP1062"</a>. Citrix Systems, Inc. 27 June 2017. Retrieved 5 July 2018.</cite>

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