# HG changeset patch
# User František Kučera <franta-hg@frantovo.cz>
# Date 1570097030 -7200
# Node ID 7e665331bc3203a1adb0903ae59baa26bd35add5
# Parent  dc35b4c01ade7bc21c3a388be077a8986abfebd6
item classification: requirement, recommendation, information

Can be highlighted using this custom CSS:

li.requirement    { color: red;   }
li.recommendation { color: blue;  }
li.information    { color: green; }

diff -r dc35b4c01ade -r 7e665331bc32 Makefile
--- a/Makefile	Wed Oct 02 23:31:57 2019 +0200
+++ b/Makefile	Thu Oct 03 12:03:50 2019 +0200
@@ -46,14 +46,23 @@
 	scp build/* globalcode.info:/var/www/sane-software.globalcode.info/v_0/
 
 
-# Prints a table with number of items in particular chapters:
-statistics:
+build/statistics.rp: text/ssm.en.xml
+	mkdir -p build
 	cat text/ssm.en.xml \
 	    | relpipe-in-xmltable \
 		--namespace "m" "tag:globalcode.info,2019:sane-software/manifesto" \
 		--relation "chapter" \
 		    --records "//m:chapter" \
 		    --attribute "name" string "m:name" \
-		    --attribute "item_count" integer "count(descendant::m:item)" \
-	    | relpipe-out-tabular
-# try also relpipe-out-gui to get the chart
+		    --attribute "requirements" integer "count(descendant::m:item[m:type='requirement'])" \
+		    --attribute "recommendations" integer "count(descendant::m:item[m:type='recommendation'])" \
+		    --attribute "informations" integer "count(descendant::m:item[m:type='information'])" \
+		    --attribute "items_total" integer "count(descendant::m:item)" \
+	> build/statistics.rp
+
+# Prints a table with number of items in particular chapters:
+statistics: build/statistics.rp
+	cat build/statistics.rp | relpipe-out-tabular
+	
+statistics-chart: build/statistics.rp
+	cat build/statistics.rp | relpipe-tr-cut ".*" "(name|.*s)" | relpipe-out-gui -title "Sane Software Manifesto – chart of rule types"
diff -r dc35b4c01ade -r 7e665331bc32 schema/ssm.xsd
--- a/schema/ssm.xsd	Wed Oct 02 23:31:57 2019 +0200
+++ b/schema/ssm.xsd	Thu Oct 03 12:03:50 2019 +0200
@@ -56,6 +56,7 @@
 	<xs:complexType name="Item">
 		<xs:sequence>
 			<xs:element name="id" type="ID"/>
+			<xs:element name="type" type="ItemType"/>
 			<xs:element name="text" type="xs:string" minOccurs="1" maxOccurs="unbounded"/>
 			<xs:element name="note" type="xs:string" minOccurs="0" maxOccurs="unbounded"/>
 			<xs:element name="link" type="Link" minOccurs="0" maxOccurs="unbounded"/>
@@ -63,6 +64,32 @@
 		</xs:sequence>
 	</xs:complexType>
 	
+	<xs:simpleType name="ItemType" final="restriction" >
+		<xs:restriction base="xs:string">
+			<xs:enumeration value="requirement">
+				<xs:annotation>
+					<xs:documentation>
+						strict requirement that must be followed in order to call the software Sane
+					</xs:documentation>
+				</xs:annotation>
+			</xs:enumeration>
+			<xs:enumeration value="recommendation">
+				<xs:annotation>
+					<xs:documentation>
+						recommendation that should be followed in order to call the software Sane, but might be neglected if there is a good reason to do so
+					</xs:documentation>
+				</xs:annotation>
+			</xs:enumeration>
+			<xs:enumeration value="information">
+				<xs:annotation>
+					<xs:documentation>
+						additional information which supplements the requirements and recommendations or clarifies the purpose of the chapter
+					</xs:documentation>
+				</xs:annotation>
+			</xs:enumeration>
+		</xs:restriction>
+	</xs:simpleType>
+	
 	<xs:complexType name="Link">
 		<xs:sequence>
 			<xs:element name="url" type="URL"/>
diff -r dc35b4c01ade -r 7e665331bc32 templates/ssm.xhtml.xsl
--- a/templates/ssm.xhtml.xsl	Wed Oct 02 23:31:57 2019 +0200
+++ b/templates/ssm.xhtml.xsl	Thu Oct 03 12:03:50 2019 +0200
@@ -89,7 +89,7 @@
 	
 	
 	<xsl:template match="m:item">
-		<li id="{m:id}">
+		<li id="{m:id}" class="{m:type}">
 			<xsl:apply-templates select="m:text"/>
 			<xsl:text> </xsl:text>
 			<a href="#{m:id}" class="anchor">#</a>
diff -r dc35b4c01ade -r 7e665331bc32 text/ssm.en.xml
--- a/text/ssm.en.xml	Wed Oct 02 23:31:57 2019 +0200
+++ b/text/ssm.en.xml	Thu Oct 03 12:03:50 2019 +0200
@@ -23,6 +23,7 @@
 		<id>ca4d0f6c-9996-49ac-8647-b7f15b049b03</id>
 		<item>
 			<id>a755410b-6264-4094-b339-aeca55448e8d</id>
+			<type>requirement</type>
 			<text>Every piece of Sane software is also Free software (as originally defined by Richard Stallman).</text>
 			<text>Which means that the user has freedom to</text>
 			<text>run the program for any purpose,</text>
@@ -45,10 +46,12 @@
 		</item>
 		<item>
 			<id>b7cd1a50-79eb-4df2-925c-7243a46d5ed8</id>
+			<type>information</type>
 			<text>The user controls his computer and software and owns the data. Not the author of the software or anyone else without user's explicit consent.</text>
 		</item>
 		<item>
 			<id>c78a9796-7862-4dd2-8ad9-3fdae094fe2c</id>
+			<type>requirement</type>
 			<text>Must be buildable using free software toolchain (like GNU/Linux + GCC or OpenJDK etc.).</text>
 			<link>
 				<url>https://www.gnu.org/prep/maintain/maintain.html#Ethical-and-Philosophical-Consideration</url>
@@ -61,6 +64,7 @@
 		</item>
 		<item>
 			<id>b3c0daaf-dcaf-49a8-ae38-40590456a315</id>
+			<type>requirement</type>
 			<text>Must not promote non-free (proprietary) software or services.</text>
 			<link>
 				<url>https://www.gnu.org/prep/standards/standards.html#References</url>
@@ -71,11 +75,12 @@
 		</item>
 		<item>
 			<id>b2fd5d2d-4d47-48e8-8abc-4b1aa94a7951</id>
+			<type>recommendation</type>
 			<text>Copyleft licenses (like GNU GPL or GNU Affero GPL) are strongly recommended because they guarantee software freedoms to every single end-user and prevent possibility that freedom vanishes somewhere in the distribution chain and the user can not benefit from the free software albeit the software is build on originally free source code.</text>
 		</item>
 		<item>
 			<id>c3599313-338b-428d-885f-964a443d76c6</id>
-			<!-- TODO: MUST + exception for older software -->
+			<type>requirement</type>
 			<text>The license must be compatible with GNU GPLv3 in order to allow mixing with the GPL code.</text>
 			<text>The only exception is older software (created before this manifesto i.e. 2019) which is unable to change the license</text>
 			<text>due to the copyright owned by many authors who can not be reached anymore and who can not provide approval with the license upgrade.</text>
@@ -85,6 +90,7 @@
 		</item>
 		<item>
 			<id>f39b90ae-0054-467e-a9e2-43379b7c2331</id>
+			<type>requirement</type>
 			<text>If the software is distributed with a hardware, the hardware must support installation of independently built software without any restrictions or requirements (e.g. digital signature from the original author).</text>
 		</item>
 	</chapter>
@@ -94,6 +100,7 @@
 		<id>e1c828c5-0a4f-4948-9943-db1ae16a42d5</id>
 		<item>
 			<id>c63ea2ac-c255-4f3e-a0e2-b49d1e145347</id>
+			<type>requirement</type>
 			<text>At least basic documentation must be released under a free license (GNU FDL is recommended).</text>
 			<link>
 				<url>https://www.gnu.org/prep/standards/standards.html#License-for-Manuals</url>
@@ -104,10 +111,12 @@
 		</item>
 		<item>
 			<id>fd8e3bbd-d46a-40fe-85a6-b902336456d4</id>
+			<type>requirement</type>
 			<text>Every advertised feature must be properly documented. Undocumented features can not be considered as features from the user/customer point-of-view.</text>
 		</item>
 		<item>
 			<id>e4dede5b-059e-4e47-b03d-80142b8467f1</id>
+			<type>information</type>
 			<text>There might be also other documentation/books released under any license and price.</text>
 			<link>
 				<url>https://www.gnu.org/prep/standards/standards.html#Reading-other-Manuals</url>
@@ -119,6 +128,7 @@
 		</item>
 		<item>
 			<id>c0df4d14-43f8-4b61-83c4-fb5896161aeb</id>
+			<type>requirement</type>
 			<text>But average software engineer must be able to build and operate the software with just the free (basic) documentation.</text>
 			<link>
 				<url>https://www.gnu.org/prep/standards/standards.html#Configuration</url>
@@ -129,9 +139,11 @@
 		</item>
 		<item>
 			<id>e6cd9c52-0e66-402c-930c-901fa66acd22</id>
+			<type>requirement</type>
 			<text>There must be a free documentation with description of building and running the software on a fresh operating system installation including description of all dependencies.</text>
 		</item>
 		<!--
+		TODO: documentation target groups and big picture:
 		<item><id></id><text>documentation should focus on all target groups: users, administrators, developers</text></item>
 		<item><id></id><text>there must be a big picture and software architercure described</text></item>
 		-->
@@ -142,6 +154,7 @@
 		<id>aa8bd952-842b-4391-aefe-d9b3750e432d</id>
 		<item>
 			<id>a8beddfc-11e3-4012-9f88-f79dc88eee16</id>
+			<type>requirement</type>
 			<text>Semantic versioning is required.</text>
 			<text>The version number consists of three numbers: major.minor.pach.</text>
 			<text>Major version is incremented if there is an incompatible change.</text>
@@ -164,33 +177,40 @@
 		</item>
 		<item>
 			<id>cf557a11-b307-4c2f-a7b5-5d2485d23258</id>
+			<type>requirement</type>
 			<text>Once publicly released, the package must not be changed anymore – if a change (even a small fix) is needed, new version number must be assigned.</text>
 		</item>
 		<item>
 			<id>dd013325-bf22-43d3-9579-0e272e2ac344</id>
+			<type>information</type>
 			<text>APIs, file formats and protocols might (and usually should) be semantically versioned independently from the implementation.</text>
 			<note>In such case, there should be a table documenting which API/format/protocol version matches which implementation version.</note>
 		</item>
 		<item>
 			<id>dacb98cc-b558-4f0e-942d-e12004e45606</id>
+			<type>recommendation</type>
 			<text>The branching model in the version control system should reflect the semantic versioning.</text>
 			<text>The released version e.g. 2.3.1 should be tagged as v2.3.1 and be placed in the v_2.3 branch.</text>
 			<text>Where the v_2.3 branch was forked from the v_2 branch – from the v2.3 tag.</text>
 		</item>
 		<item>
 			<id>ae33d206-4988-44ec-b8e2-3120019fcf2f</id>
+			<type>recommendation</type>
 			<text>Do not remove features unless they are really obsolete, unused or irreparably broken.</text>
 		</item>
 		<item>
 			<id>c542336a-fce8-412c-a8dd-1328c1a884ec</id>
+			<type>information</type>
 			<text>The user interface might be simplified or redesigned while preserving the features under the hood.</text>
 		</item>
 		<item>
 			<id>ba8fecf0-5c02-4fdf-abdc-2650d428f82a</id>
+			<type>requirement</type>
 			<text>Incompatible changes must be planned and announced in advance.</text>
 		</item>
 		<item>
 			<id>f4826891-e732-45e8-b929-25d1182fa141</id>
+			<type>requirement</type>
 			<text>Upgrade scripts and upgrade documentation must be provided.</text>
 		</item>
 	</chapter>
@@ -200,23 +220,28 @@
 		<id>d34ce339-197c-44ee-9e5c-6d7e212f8c10</id>
 		<item>
 			<id>be4c72d1-c494-4c44-aeb4-c5847f5a3524</id>
+			<type>recommendation</type>
 			<text>Open standards (protocols, formats) should be used if they exist.</text>
 		</item>
 		<item>
 			<id>b2202690-8a6c-467f-a2b1-b154f470aa77</id>
+			<type>requirement</type>
 			<text>Already existing open protocol/format must not be modified or extended in a way which effectively creates a proprietary protocol/format.</text>
 		</item>
 		<item>
 			<id>dd206223-9525-4229-be2b-84b07c2b8244</id>
+			<type>information</type>
 			<text>New open standards (specifications) should be defined and published if needed.</text>
 			<text>Such standards must be semantically versioned.</text>
 		</item>
 		<item>
 			<id>d341b78e-15b9-4077-8b48-9e54c93391ac</id>
+			<type>recommendation</type>
 			<text>And they should be written in machine readable format (e.g. WSDL, WADL, ASN.1, XSD, Diameter dictionary, D-Bus) or at least formal language (Backus–Naur Form, EBNF etc.)</text>
 		</item>
 		<item>
 			<id>d61b3e31-bb9f-4333-87c8-9fb32f33a49d</id>
+			<type>recommendation</type>
 			<text>Also configuration should have machine readable description and the user should be able to test it by executing a command (validator).</text>
 		</item>
 	</chapter>
@@ -226,16 +251,19 @@
 		<id>c56e7e86-e480-4a5d-8a47-ab155dcd59b1</id>
 		<item>
 			<id>e50424e8-94f3-48aa-bf01-0ba984eb2349</id>
+			<type>requirement</type>
 			<text>Larger and multi-purpose software must be divided into smaller modules.</text>
 		</item>
 		<item>
 			<id>e752efae-75c9-4620-aa14-65c4949a3609</id>
+			<type>requirement</type>
 			<text>The modules must have defined dependencies (less = better).</text>
 			<note>Dependencies needed to write an extension/module (i.e. header files, API classes/interfaces) should be as small as possible (do not require large codebase to write a mere plug-in).</note>
 			<note>The required dependency should contain just interfaces (method/function signatures) and data structures but no implementation (executable code).</note>
 		</item>
 		<item>
 			<id>e9988ed0-d686-41a0-9f1e-3243ac5235d5</id>
+			<type>recommendation</type>
 			<text>Particular modules should be compilable and executable (installable) independently.</text>
 			<text>It should not be necessary to recompile the core and other modules if only one module is changed.</text>
 			<note>Whole system should be compilable (buildable) with only selected modules – must not require compilation or even distribution of all modules, if they are not necessary.</note>
@@ -243,6 +271,7 @@
 		</item>
 		<item>
 			<id>a7bc51ba-9832-4f75-983c-e75dc0801113</id>
+			<type>information</type>
 			<text>Another good ways to extend and customize the software are:</text>
 			<text>configuration (XML, INI, RegExp, SQL, XSLT, XPath etc.) and</text>
 			<text>scripting (Guile, Bash, Python, Lua, ECMA Script etc.)</text>
@@ -268,18 +297,22 @@
 		<id>a0376231-d53e-45fd-826f-47148721de3d</id>
 		<item>
 			<id>d95dc118-7473-4f18-8b9e-35830a87b269</id>
+			<type>recommendation</type>
 			<text>there should be automated build-time complex tests for the package – feed the program with sample input and verify expected output</text>
 		</item>
 		<item>
 			<id>a9f6725d-ddf1-41ee-96b4-15f3b851cb50</id>
+			<type>recommendation</type>
 			<text>there should be also automated runtime/postinstall tests – in order to verify that software was installed properly, all required dependencies are met and basic function is guaranteed – the program should report problem during its start (as a warning if it is not fatal), instead of unexpected failures during operation</text>
 		</item>
 		<item>
 			<id>d610c04b-cc44-48c7-b069-f41b90bdef0f</id>
+			<type>recommendation</type>
 			<text>unit tests are recommended for code parts that are internally complex (algorithms, important business logic) and have simple interfaces</text>
 		</item>
 		<item>
 			<id>e85baeda-8fcb-42d1-bb53-d7386a941ae7</id>
+			<type>recommendation</type>
 			<text>each external interface should contain procedure/function that does nothing important or heavy, is idempotent and returns simple response which proves that the interface (connection) is working (e.g. echo, print version, status or current time); if authentication and authorization mechanisms are present, there should be one procedure/function callable anonymously and one that requires authorization</text>
 		</item>
 	</chapter>
@@ -289,18 +322,22 @@
 		<id>f3afbaf2-0933-43d2-aed0-8dc568b9429f</id>
 		<item>
 			<id>a96206c9-3e69-483d-b575-6bab9dec4a30</id>
+			<type>requirement</type>
 			<text>correctness, safety and readability is preferred to performance</text>
 		</item>
 		<item>
 			<id>d8eba0dd-4305-44b9-80ea-4c38b6dfa633</id>
+			<type>recommendation</type>
 			<text>use strong data typing, declare preconditions and possible exceptions</text>
 		</item>
 		<item>
 			<id>ebea0c16-f820-444d-a73c-3054ca6a38c8</id>
+			<type>requirement</type>
 			<text>data structures must be known and well documented – do not use undocumented map keys or properties</text>
 		</item>
 		<item>
 			<id>e24e600e-6542-4664-8cf0-2d8c6feb6c13</id>
+			<type>recommendation</type>
 			<text>code, comments and specification should be written in the same natural language</text>
 			<link>
 				<url>https://www.gnu.org/prep/standards/standards.html#Comments</url>
@@ -311,10 +348,12 @@
 		</item>
 		<item>
 			<id>fa92aa33-a69f-43b8-9051-9bfdcd3d293f</id>
+			<type>recommendation</type>
 			<text>there should be a dictionary of used terms, so whole team and also users and customers will speak the same language</text>
 		</item>
 		<item>
 			<id>b9345a0e-c672-45d3-b93b-8d0fb4ece8b3</id>
+			<type>recommendation</type>
 			<text>fail fast – errors in the code should be reported during build time or at least on first execution – do not silently continue if given error would lead to failure later in another part of the code – bad weak coupling leads to difficult debugging</text>
 		</item>
 	</chapter>
@@ -324,14 +363,17 @@
 		<id>ba8fbf3a-9254-4dd8-bb77-b0cd4907c6aa</id>
 		<item>
 			<id>f5389468-2f8a-43c8-884a-8df6bc844453</id>
+			<type>recommendation</type>
 			<text>less LOC (resp. cyclomatic complexity) = better</text>
 		</item>
 		<item>
 			<id>b6b6c838-be6d-43d5-9f99-2098fa217c54</id>
+			<type>recommendation</type>
 			<text>reduce boilerplate and unused code</text>
 		</item>
 		<item>
 			<id>b07fe0f0-2be7-4c1c-9b19-b671269c5e58</id>
+			<type>recommendation</type>
 			<text>use code generators (during build process, not to generate code to be manually edited and versioned)</text>
 			<link>
 				<url>https://www.gnu.org/prep/standards/standards.html#Releases</url>
@@ -347,42 +389,52 @@
 		<id>afd8f6c7-8dac-4a83-a101-64f017ec7ada</id>
 		<item>
 			<id>c2d5a677-a721-40e3-b560-73afe76fe2b0</id>
+			<type>recommendation</type>
 			<text>avoid NIH and reuse code but also avoid dependency hell</text>
 		</item>
 		<item>
 			<id>d214987c-881c-450b-8544-82141866f541</id>
+			<type>requirement</type>
 			<text>know your dependencies, know why they are required</text>
 		</item>
 		<item>
 			<id>c8402612-e136-43b5-9209-f9800d2e94da</id>
+			<type>recommendation</type>
 			<text>reduce dependencies to only necessary ones</text>
 		</item>
 		<item>
 			<id>cbeb9a6b-7b64-4452-8caf-246c082a853d</id>
+			<type>recommendation</type>
 			<text>depend on small and useful libraries – not on bulky application packages or libraries with large transitive dependencies</text>
 		</item>
 		<item>
 			<id>cbaf55be-8ffb-4109-9c83-083d1b3e793a</id>
+			<type>requirement</type>
 			<text>if dependency on bulky application package is inevitable, add a layer of abstraction – create a generic interface and connector and allow others to replace the bulky package with their own sane implementation</text>
 		</item>
 		<item>
 			<id>d7655989-a5e4-4123-9147-3782fc05a5ee</id>
+			<type>recommendation</type>
 			<text>helper tools:</text>
 			<item>
 				<id>a5307bc9-36ed-4d83-963a-30c5c67613aa</id>
+				<type>recommendation</type>
 				<text>if you e.g. use Bash and Perl during the build process, do not add also Python dependency, write it in Perl – or use Python instead of Perl.</text>
 			</item>
 			<item>
 				<id>b0237d84-7068-4b2b-bc28-ce5e0a0061e4</id>
+				<type>recommendation</type>
 				<text>Or if you use Java as your main language, consider not using Python/Perl for scripting and use Java for it</text>
 			</item>
 		</item>
 		<item>
 			<id>a0f42ec9-5032-4f6d-a50a-4b7bddde77f0</id>
+			<type>requirement</type>
 			<text>if possible, always depend on abstract interfaces, not on particular implementations</text>
 		</item>
 		<item>
 			<id>c5974dcd-4855-40c5-ad22-894c128ca1dc</id>
+			<type>recommendation</type>
 			<text>from the whole system point-of-view, Bootstrappable builds should be taken into account</text>
 			<link>
 				<url>http://bootstrappable.org/</url>
@@ -397,14 +449,18 @@
 		<id>fb0c484b-d97a-4cb4-9b8f-04d386ef0f54</id>
 		<item>
 			<id>aeef6a5c-bafc-4fcf-9b21-5829e8a44c5e</id>
+			<type>recommendation</type>
 			<text>small code footprint and minimal dependencies makes it easy to do security audit</text>
 		</item>
 		<item>
 			<id>ab69d352-da68-40c2-a3e1-a8fd5c41ad0a</id>
+			<type>recommendation</type>
 			<text>avoid ungrounded refactoring and reformatting – they make mess and noise in the version control system and impede the audit</text>
+			<note>This rule is classified as a recommendation only because of the fact that past mistakes usually can not be reverted, which would disqualify the software forever. However it should be normally considered to be a requirement.</note>
 		</item>
 		<item>
 			<id>e4db77b8-f145-4e43-bf8b-eb775b9352c8</id>
+			<type>information</type>
 			<text>refactoring/reformatting changesets should be separated from substantive changes</text>
 		</item>
 	</chapter>
@@ -414,10 +470,12 @@
 		<id>da6436f7-c352-4d52-915b-02d0d1880e40</id>
 		<item>
 			<id>e5154815-eeae-4664-8883-a29a64eea325</id>
+			<type>recommendation</type>
 			<text>builds should be reproducible: same code/version → same binary package</text>
 		</item>
 		<item>
 			<id>a3b0c164-4dde-4e33-b3be-5478d2a187e2</id>
+			<type>requirement</type>
 			<text>if not, it should be documented, why and how build products might differ, and there should be plan/task to make it reproducible</text>
 		</item>
 	</chapter>
@@ -427,26 +485,32 @@
 		<id>e7ded437-aaa2-475a-9754-0b2d89394b24</id>
 		<item>
 			<id>a0d9322c-7d2b-4632-b543-7e0d75bb5f0b</id>
+			<type>requirement</type>
 			<text>every released version (binary or source) must be cryptographically signed by the authors (GnuPG/OpenPGP is strongly recommended)</text>
 		</item>
 		<item>
 			<id>feb97ec0-c35c-49b8-b455-517a929b4a84</id>
+			<type>recommendation</type>
 			<text>there should be also checksums/hashes for every released package</text>
 		</item>
 		<item>
 			<id>ff33e209-0460-4a43-997f-d6b32b73997b</id>
+			<type>recommendation</type>
 			<text>if HTTP is supported, HTTPS should also be – the attacker/eavesdropper should not even know what software/package/update is downloaded by the user</text>
 		</item>
 		<item>
 			<id>c1f83b3a-e564-4483-91de-9c08723efd13</id>
+			<type>recommendation</type>
 			<text>the attacker should not be able to suppress updates – the program must not be silent in such case and must warn the user that something possibly nasty and dangerous is happening</text>
 		</item>
 		<item>
 			<id>c6a755c9-a54e-4ffb-8f70-bfbd851b93c5</id>
+			<type>recommendation</type>
 			<text>releases should be downloadable also (or exclusively) over BitTorrent or other P2P network</text>
 		</item>
 		<item>
 			<id>f9275c3c-2b09-4aec-ac28-76ff827d52ce</id>
+			<type>requirement</type>
 			<text>source code repository must be accessible through an encrypted connection</text>
 		</item>
 	</chapter>
@@ -456,22 +520,26 @@
 		<id>d3edb71b-8668-4290-a669-19694956e3aa</id>
 		<item>
 			<id>c967092e-09e9-4c68-90bf-aa8cb441f7dc</id>
+			<type>requirement</type>
 			<text>Network connectivity must not be required during build – the build must be possible completely offline.</text>
 			<text>All dependencies must be downloadable and documented including secure hashes or preferably cryptographic signatures.</text>
 			<note>It should be straightforward to collect all dependencies transfer them in space or time and build the software (e.g. on another computer or in next decade).</note>
 		</item>
 		<item>
 			<id>b5515d33-1531-4361-8baf-a99ca461e763</id>
+			<type>requirement</type>
 			<text>If dependencies are optionally automatically downloaded during or before build, the packaging system must cryptographically verify that that they are undamaged.</text>
 			<note>So it should not be possible to endanger the user by MITM attack.</note>
 		</item>
 		<item>
 			<id>f700413a-fde1-460c-8633-76985e98007c</id>
+			<type>requirement</type>
 			<text>Avoid unwanted network interactions during runtime.</text>
 			<text>There must be no „call home“ or update-checks without user's explicit consent.</text>
 		</item>
 		<item>
 			<id>f55c2ebd-c3ba-44f7-ae92-06f679780ec7</id>
+			<type>requirement</type>
 			<text>If any network connection is used, it must be by default cryptographically secured against MITM attacks.</text>
 			<note>It might be possible to disable the encryption on user's explicit request (in order to get better performance on a trusted private network).</note>
 			<note>For debugging and testing purposes it is better to allow dumping the private/session keys rather than disabling the encryption.</note>
@@ -484,6 +552,7 @@
 		<id>fa655b7c-f22d-4b98-ab7b-c0d0f608aad8</id>
 		<item>
 			<id>e56aad13-f68e-47ea-8b88-65fee6b5331a</id>
+			<type>requirement</type>
 			<text>Any software with nontrivial user interface must be internationalized</text>
 			<text>which means that it allows localization (translation of the UI to national languages and other customization to national conventions).</text>
 			<link>
@@ -495,10 +564,12 @@
 		</item>
 		<item>
 			<id>ad2f572b-497b-4523-b435-f9752fd1518a</id>
+			<type>recommendation</type>
 			<text>It should be possible to localize the user interface independently from the original author by creating an additionally installable language pack.</text>
 		</item>
 		<item>
 			<id>c3827486-6bf5-45c0-9a6d-61ad659d8ba1</id>
+			<type>recommendation</type>
 			<text>GNU Gettext or other standard framework (like Java resource bundles) should be used.</text>
 			<link>
 				<url>https://www.gnu.org/prep/standards/standards.html#Internationalization</url>
@@ -509,40 +580,51 @@
 		</item>
 		<item>
 			<id>a57f4fc8-1f64-46e2-a91d-3a598c37f2e9</id>
+			<type>recommendation</type>
 			<text>Error messages should have assigned unique error codes, so it is possible to find relevant information regardless the current locale.</text>
 		</item>
 		<!-- GEC is recommended for such unique error identifiers -->
 		<item>
 			<id>eba92867-5c1b-45b6-943a-a3fa6ea67e38</id>
+			<type>requirement</type>
 			<text>Data formats and protocols must be language/locale independent.</text>
 			<item>
 				<id>fee73fee-4940-47ac-84b6-15646f5f61c7</id>
+				<type>requirement</type>
 				<text>e.g. use decimal point instead of comma and no thousand separators for numbers, use standardized date formats</text>
 			</item>
 			<item>
 				<id>f1a00487-ed89-4443-99b5-63ab4c635690</id>
+				<type>requirement</type>
 				<text>in general: everything that is expected to be machine-readable or machine-generated must be independent from the current locale</text>
 			</item>
 		</item>
 		<item>
 			<id>e6603e06-0b2c-439e-82ce-45f9744b2ef8</id>
+			<type>requirement</type>
 			<text>Character encoding:</text>
 			<item>
 				<id>abd42a7f-bd4b-4034-98ee-85a33094b5c1</id>
+				<type>recommendation</type>
+				<!-- TODO: requirement? -->
 				<text>The software should always be aware of it and do not just blindly use current platform's default.</text>
 				<note>The other side might run on different platform with different default. Or a file might be opened later on different platform.</note>
 			</item>
 			<item>
 				<id>abd48eae-d287-4729-80ee-52dd018b0ba7</id>
+				<type>requirement</type>
 				<text>If given software/format/protocol has some default encoding, it must be clearly defined in its specification and this default must not be changed without changing the major version number.</text>
 			</item>
 			<item>
 				<id>c9f4d9f4-f959-48ad-bc68-6720dd4596e3</id>
+				<type>requirement</type>
 				<text>If there is no default, the encoding must be specified in the metadata attached (e.g. protocol headers, extended attributes on filesystem) to the actual data or at least at the beginning of the data (like declaration in XML format).</text>
 			</item>
 		</item>
 		<item>
 			<id>ce45c382-6ec5-41e8-869a-a0e758621b13</id>
+			<type>recommendation</type>
+			<!-- TODO: requirement? -->
 			<text>The metric system should be used as default.</text>
 		</item>
 	</chapter>
@@ -552,6 +634,7 @@
 		<id>a931dcbb-8043-4e21-838f-8e8122bb8af3</id>
 		<item>
 			<id>fff90688-907e-48eb-a48a-2ae6d6b42f0a</id>
+			<type>recommendation</type>
 			<text>Following information should be provided in RSS/Atom or other machine readable format:</text>
 			<text>announcements (security, new versions, infrastructure outage),</text>
 			<text>blog posts, tutorials</text>
@@ -560,6 +643,7 @@
 		</item>
 		<item>
 			<id>e8b18e02-d7b2-4584-8eee-dbaf823f6800</id>
+			<type>recommendation</type>
 			<text>A mailing list (e-mail conference) or other equivalently open and decentralized technology should be used for the many-to-many communication.</text>
 			<note>Having an „old school“ mailing list is not mandatory – it might be e.g. a P2P distributed technology or some self-hosted forum.</note>
 			<link>
@@ -570,6 +654,7 @@
 		</item>
 		<item>
 			<id>e746eb5b-8d8b-4ec8-9315-a311f35e156a</id>
+			<type>requirement</type>
 			<text>Users must not be pushed to register at a proprietary social networks resp. at particular providers of such services.</text>
 			<text>Users without such account must not be disadvantaged – use open and decentralized networks/protocols instead.</text>
 			<link>
@@ -582,21 +667,25 @@
 		</item>
 		<item>
 			<id>ff537045-819e-4dec-a020-d2c9f2c3292b</id>
+			<type>recommendation</type>
 			<text>There should be a second-level internet domain for the project or its team.</text>
 			<note>But do not buy an internet domain if you are not prepared to mainain it for decades – rather use third level domain under some reliable second level domain maintained by a credible group or person – think of that every expired domain helps spammers and scammers and hurts the users.</note>
 		</item>
 		<item>
 			<id>a1141312-5177-4d68-bb14-fce952d542c3</id>
+			<type>recommendation</type>
 			<text>URLs should be as stable as possible – accessible in next decade.</text>
 			<note>Do not break old links, set up redirections if needed.</note>
 		</item>
 		<item>
 			<id>c5b6d3d7-2f1f-4371-acfa-d6af1588c2cb</id>
+			<type>requirement</type>
 			<text>The website must be independent and must contain everything needed – any content (JavaScripts, CSS, fonts, images etc.) downloaded from other domains must not be required to browse/use the website.</text>
 			<note>Embedded content from the third-party servers causes leaks of sensitive data (tracking of the users) and also denies decentralized nature of the internet.</note>
 		</item>
 		<item>
 			<id>d5fbcc9e-a12c-44ce-909b-f514a579ab7e</id>
+			<type>requirement</type>
 			<text>JavaScript or other code executed on client computers must be also free software with properly declared license.</text>
 			<link>
 				<url>https://www.gnu.org/philosophy/javascript-trap.html</url>
@@ -612,6 +701,7 @@
 		</item>
 		<item>
 			<id>e02c3fba-93f3-4f16-bd23-f49a203e40bc</id>
+			<type>recommendation</type>
 			<text>The website should not require a modern complex browser for basic tasks like reading the documentation, downloading a release or submitting a bug report.</text>
 			<text>Such tasks should be feasible even with simple text browsers (e.g. Lynx or Links2).</text>
 			<note>Modern browsers consists of 20 or 25 millions lines of code. Requiring such complex software for basic tasks is not reasonable.</note>
@@ -624,12 +714,14 @@
 		</item>
 		<item>
 			<id>c89e8699-574c-4b28-9f65-6284d6051f68</id>
+			<type>requirement</type>
 			<text>There must be a crpyptographically secured (GnuPG/OpenPGP or X.509) e-mail address or a secure web form for receiving security vulnerabilities reports.</text>
 			<note>Particular authors should publish their public keys.</note>
 			<note>Every security incident must be clearly documented and investigated – do not obscure it.</note>
 		</item>
 		<item>
 			<id>fed07648-106a-4b7c-9026-509c82109448</id>
+			<type>requirement</type>
 			<text>Source code repository (versioning system) must be public. Do not publish just source code snapshots of released versions.</text>
 			<link>
 				<url>https://www.gnu.org/prep/maintain/maintain.html#Old-Versions</url>
@@ -645,10 +737,12 @@
 		<id>eae0f528-a5ce-4809-a25d-9f9ab6311f3d</id>
 		<item>
 			<id>efae935b-fef1-4bbd-a2c5-e12048524e35</id>
+			<type>recommendation</type>
 			<text>Good quality code contributions with appropriate copyright and patent licenses or assignments should be accepted from anyone.</text>
 		</item>
 		<item>
 			<id>ea429f77-44db-4eb4-9925-0d28f9abf47a</id>
+			<type>information</type>
 			<text>The „good quality code“ is defined by the project and might involve code style, idioms, design patterns, software architecture, required tests, documentation etc.</text>
 			<link>
 				<url>https://www.gnu.org/prep/maintain/maintain.html#Clean-Ups</url>
@@ -659,6 +753,7 @@
 		</item>
 		<item>
 			<id>b0022cea-4caf-4663-ae24-5fc5da31333b</id>
+			<type>recommendation</type>
 			<text>Such requirements and rules should be available to the contributor before he begins.</text>
 			<text>However (especially smaller) projects might communicate such code quality requirements and provide consultations and guidance during the contribution.</text>
 			<link>
@@ -670,18 +765,22 @@
 		</item>
 		<item>
 			<id>ea4a8d23-b2df-42eb-84ae-7687d35838c8</id>
+			<type>requirement</type>
 			<text>In order to contribute, it must not be required:</text>
 			<note>The term „contribution“ includes not only source code (patch) but also bugreports, feature specifications, documentation, assets (graphics, music etc.) or similar artifacts.</note>
 			<item>
 				<id>da7dabf6-f2d8-43bc-8121-6e4527eaa691</id>
+				<type>requirement</type>
 				<text>to have an account on any particular third party service like particular e-mail or hosting provider,</text>
 			</item>
 			<item>
 				<id>dfd6a77f-7c4a-430a-8199-8ea71ec7ee8c</id>
+				<type>requirement</type>
 				<text>to sign a contract (which includes accepting „Terms and conditions“) with any particular third party (e.g. source code hosting provider),</text>
 			</item>
 			<item>
 				<id>af6a589f-d419-483f-b7b2-07b6e9da3924</id>
+				<type>requirement</type>
 				<text>to sign any political, religious or other proclamation or agree with it.</text>
 				<link>
 					<url>https://www.gnu.org/prep/maintain/maintain.html#Other-Politics</url>
@@ -693,17 +792,21 @@
 		</item>
 		<item>
 			<id>b4319392-8d6a-4f07-8a94-7ae2ed97c787</id>
+			<type>information</type>
 			<text>In order to contribute, it might be required:</text>
 			<item>
 				<id>f9f52f2f-b057-4a2f-9131-682fac54c853</id>
+				<type>information</type>
 				<text>to have an e-mail address (but not at particular domain),</text>
 			</item>
 			<item>
 				<id>ef9e64cc-90b0-4002-ab5a-a1135332c7fe</id>
+				<type>information</type>
 				<text>or use similar decentralized technology which has open standard and free software implementations,</text>
 			</item>
 			<item>
 				<id>d7a94eba-efd6-471f-9c32-6ee9d3b8ab29</id>
+				<type>information</type>
 				<text>to assign the copyright to the project and grant a free license for all patents relevant to the contribution.</text>
 				<link>
 					<url>https://www.gnu.org/prep/maintain/maintain.html#Copyright-Papers</url>
@@ -715,6 +818,8 @@
 		</item>
 		<item>
 			<id>e394c792-8294-4f15-a356-89cd0a7aa255</id>
+			<type>recommendation</type>
+			<!-- TODO: requirement? -->
 			<text>The project should record all accepted contributions and maintain a public list of all authors/contributors.</text>
 			<link>
 				<url>https://www.gnu.org/prep/maintain/maintain.html#Recording-Contributors</url>
@@ -725,6 +830,7 @@
 		</item>
 		<item>
 			<id>b5a128a2-31d9-49df-890c-59a770f7afa9</id>
+			<type>requirement</type>
 			<text>The contributor must not loose the right to use or distribute the contributed code under any license (of his choice).</text>
 		</item>
 	</chapter>