head 1.12; access ; symbols; locks; strict; comment @@; 1.12 date 2006.08.29.03.07.41; author DonovanSharp; state Exp; branches; next 1.11; 1.11 date 2006.07.09.06.29.25; author DonovanSharp; state Exp; branches; next 1.10; 1.10 date 2006.07.09.05.02.36; author DonovanSharp; state Exp; branches; next 1.9; 1.9 date 2006.07.07.01.45.32; author DonovanSharp; state Exp; branches; next 1.8; 1.8 date 2006.07.06.05.44.45; author DonovanSharp; state Exp; branches; next 1.7; 1.7 date 2006.07.05.07.37.55; author DonovanSharp; state Exp; branches; next 1.6; 1.6 date 2006.07.05.04.28.27; author DonovanSharp; state Exp; branches; next 1.5; 1.5 date 2006.07.04.06.59.30; author DonovanSharp; state Exp; branches; next 1.4; 1.4 date 2006.07.04.04.55.19; author DonovanSharp; state Exp; branches; next 1.3; 1.3 date 2006.06.08.04.21.57; author DonovanSharp; state Exp; branches; next 1.2; 1.2 date 2006.06.02.06.07.37; author DonovanSharp; state Exp; branches; next 1.1; 1.1 date 2006.06.01.05.55.39; author DonovanSharp; state Exp; branches; next ; desc @@ 1.12 log @@ text @%META:TOPICINFO{author="DonovanSharp" date="1156820861" format="1.1" reprev="1.12" version="1.12"}% %META:TOPICPARENT{name="SddContents"}% ---++SDD Part 0: Introduction and Primer to the SDD Standard ---+++2.4 Dichotomous keys. ---++++2.4.1 Traditional dichotomous keys. Dichotomous keys (Box 2.3.1) are specialised identification tools comprising fragments of descriptive data arranged in couplets forming a branching tree. Each fragment (lead) comprises a small (occasionally verbose) natural-language description. Each node in the tree typically has two branches (dichotomy) but may have three (trichotomy) or more branches. Several differing formats of dichotomous keys are traditionally used. ---++++Box 2.4.1 - Typical dichotomous keys
Key to Ascomycete genera  

Ascus unitunicate		  
    Clypeus present around ostiolar neck  
        Clypeus poorly developed Glomerella
        Clypeus well developed Hyllachora
    Clypeus lacking  
        Ascus widest in middle Physalospora
        Ascus clavate or cylindrical Glomerella
Ascus bitunicate  
    Ascostroma uniloculate Guignardia
    Ascostroma muliloculate Botryosphaeria

Key to Australian skinks in the genus Ctenotus
1 Dark upper lateral zone with one or more distinct series of pale spots or blotches along the body 2
1a Dark upper lateral zone obscurely mottled or uniform with at most a few pale spots anteriorly 3
2 Fewer than 25 lamellae under the fourth toe; supralabials 7-8 (usually 7); prefrontals separated C. arcanus
2a More than 25 lamellae under the fourth toe; supralabials 8-9 (usually 8); prefrontals usually in contact C. alleni
3 Pale mid-lateral stripe passes over the hindlimb to continue along the tail C. inornatus
3a Pale mid-lateral stripe extends to groin, then continues along the front edge of the hindlimb C. coggeri
Key to Aira naturalized in Australia
1. Inflorescence open and spreading 2
Inflorescence dense and spike-like *A. praecox
2. Pedicels 3-8 times spikelet length 3
Pedicels up to 3 times spikelet length 4
3. Spikelets c. 3.5 mm long *A. provincialis
Spikelets c. 2 mm long *A. elegantissima
4. Spikelets 2-2.5 mm long *A. cupaniana
Spikelets 2.5-3.2 mm long *A. caryophyllea
---+++2.4.2 SDD representation of dichotomous keys While dichotomous keys can be presented in various formats, the essential elements of all dichotomous keys are identical. Each consists of a tree of questions, each with two (or occasionally more) possible choices, each choice leading to another question or a taxon. A dichotomous key rendered in SDD requires three essential items: the names of the taxa being described, a set of questions (leads) used to separate the taxa, and the nodes defining the structure of the leads. A simple SDD instance document for dichotomous key data has the basic structure shown below and in Example 2.4.2. There are at least two different ways of generating a dichotomous key in a well structured SDD instance document, using statements or questions, these will be dealt with separately. %ATTACHURL%/identificationkey.gif ---++++Example 2.4.2 - Dichotomous keys within SDD
... information about the generator (Technical metadata) ... naming the entities described (Taxon names) ... the dichotomous key structure (see below)
---+++2.4.3 Dichotomous keys using statements A dichotomous key structured with statements consists mostly of the elements <lead> and <result>. <Lead> points to another couplet while <Result> points to a taxon name. ---++++Example 2.4.3 - Structure of dichotomous keys within SDD (statements)
---+++2.4.4 Dichotomous keys using questions When a dichotomous key in an SDD instance document is structured with questions the statements act as answers to questions rather than independent statements. ---++++Example 2.4.4.1 - Structure of dichotomous keys within SDD (questions)
For more information on defining taxon names using the <TaxonNames> element, see the topic [[TaxonNames][Defining taxon names]]. Note that taxa can also be arranged into hierarchies. See the topic [[TaxonHierarchies][Defining taxon hierarchies]] for more information. <Scope> describes the taxon or set of taxa to which the description applies. The <Result> element may include a <Subkey> element, which points to another complete dichotomous key. This allows a main/subkey arrangement, for example a key to the genera of a family with results leading to a subkey identifying the species within each genus. ---++++Example 2.4.4.2 - Subkeys within SDD dichotomous keys.
(key to species of first genus)) . . . etc.
-- Main.DonovanSharp - 01 Jun 2006 %META:FILEATTACHMENT{name="identificationkey2.gif" attr="" autoattached="1" comment="" date="1152236495" path="identificationkey2.gif" size="8446" user="Main.DonovanSharp" version="1"}% %META:FILEATTACHMENT{name="identificationkey.gif" attr="" autoattached="1" comment="" date="1152425392" path="identificationkey.gif" size="6008" user="Main.DonovanSharp" version="4"}% @ 1.11 log @@ text @d1 1 a1 1 %META:TOPICINFO{author="DonovanSharp" date="1152426565" format="1.1" reprev="1.11" version="1.11"}% d5 2 a6 2 ---+++2.3 Dichotomous keys. ---++++2.3.1 Traditional dichotomous keys. d10 1 a10 1 ---++++Box 2.3.1 - Typical dichotomous keys d192 1 a192 1 ---+++2.3.2 SDD representation of dichotomous keys d198 1 a198 1 A simple SDD instance document for dichotomous key data has the basic structure shown below and in Example 2.3.2. d204 1 a204 1 ---++++Example 2.3.2 - Dichotomous keys within SDD d241 1 a241 1 ---+++2.3.3 Dichotomous keys using statements d245 1 a245 1 ---++++Example 2.3.3 - Structure of dichotomous keys within SDD (statements) d319 1 a319 1 ---+++2.3.4 Dichotomous keys using questions d323 1 a323 1 ---++++Example 2.3.4 - Structure of dichotomous keys within SDD (questions) d432 2 @ 1.10 log @@ text @d1 1 a1 1 %META:TOPICINFO{author="DonovanSharp" date="1152421356" format="1.1" reprev="1.10" version="1.10"}% d196 1 a196 1 A coded sample description requires three essential items: the names of the taxa being described, a set of questions (leads) used to separate the taxa, and the nodes defining the structure of the leads. d198 1 a198 1 A simple SDD instance document for coded summary data has the basic structure shown below and in Example 2.3.2. d200 2 a242 2 There are at least two different ways of generating a dichotomous key in a well structured SDD instance document, using statements or questions d430 1 d425 1 d427 1 d429 41 a473 1 %META:FILEATTACHMENT{name="identificationkey.gif" attr="" autoattached="1" comment="" date="1152420839" path="identificationkey.gif" size="5887" user="Main.DonovanSharp" version="3"}% @ 1.9 log @@ text @d1 1 a1 1 %META:TOPICINFO{author="DonovanSharp" date="1152236732" format="1.1" reprev="1.9" version="1.9"}% d8 1 a8 1 Dichotomous keys (Box 2.3.1) are specialised identification tools comprising fragments of descriptive data arranged in couplets forming a branching tree. Each fragment (lead) comprises a small (occasionally verbose) natural-language description. d100 1 a100 2 Fewer than 25 lamellae under the fourth toe; supralabials 7-8 (usually 7); prefrontals separated d194 1 a194 1 Within the SDD structure dichotomous keys are coded with the element < IdentificationKey >, nested within a [[SddDatasets][<Dataset>]] as below. d196 4 a238 7 While dichotomous keys can be presented in various formats, the essential elements of all dichotomous keys are identical. Each consists of a tree of questions, each with two (or occasionally more) possible choices, each choice leading to another question or a taxon. SDD represents this with lists of <Questions> and <Leads>. The [[IdentificationKey][<IdentificationKey>]] element also contains a [[SddScope][<Scope>]] element, where the entities covered by the description may be defined. %ATTACHURL%/identificationkey2.gif These consistent elements are represented in SDD with the following structure. d430 1 a430 1 %META:FILEATTACHMENT{name="identificationkey.gif" attr="" autoattached="1" comment="" date="1152236509" path="identificationkey.gif" size="2890" user="Main.DonovanSharp" version="1"}% @ 1.8 log @@ text @d1 1 a1 1 %META:TOPICINFO{author="DonovanSharp" date="1152164685" format="1.1" reprev="1.8" version="1.8"}% d197 1 a197 1 %ATTACHURL%/identificationkey.jpg d239 1 a239 1 %ATTACHURL%/identificationkey2.jpg d433 2 a434 2 %META:FILEATTACHMENT{name="identificationkey2.jpg" attr="" autoattached="1" comment="" date="1151995420" path="identificationkey2.jpg" size="12419" user="Main.DonovanSharp" version="1"}% %META:FILEATTACHMENT{name="identificationkey.jpg" attr="" autoattached="1" comment="" date="1149740488" path="identificationkey.jpg" size="16701" user="Main.DonovanSharp" version="1"}% @ 1.7 log @@ text @d1 1 a1 1 %META:TOPICINFO{author="DonovanSharp" date="1152085075" format="1.1" version="1.7"}% d201 4 d231 2 d234 3 d251 4 d317 2 d320 3 d329 5 d424 2 d427 1 a427 1 ---+++2.3.5 The scope element in SDD dichotomous keys a428 3 no content yet scope subkeys @ 1.6 log @@ text @d1 1 a1 1 %META:TOPICINFO{author="DonovanSharp" date="1152073707" format="1.1" version="1.6"}% d228 1 a228 1 While dichotomous keys can be presented in various formats, the essential elements of all dichotomous keys are identical. Each consists of a tree of questions, each with two (or occasionally more) possible choices, each choice leading to another question or a taxon. @ 1.5 log @@ text @d1 1 a1 1 %META:TOPICINFO{author="DonovanSharp" date="1151996370" format="1.1" reprev="1.5" version="1.5"}% d195 1 a195 1 Within the SDD structure dichotomous keys are coded with the element < IdentificationKey >, nested within a <[[SddDatasets][dataset]]> as below. @ 1.4 log @@ text @d1 1 a1 1 %META:TOPICINFO{author="DonovanSharp" date="1151988919" format="1.1" reprev="1.4" version="1.4"}% d228 1 a228 1 While dichotomous keys can be presented in various formats, the essential elements of all dichotomous keys are identical. Each consists of a tree of questions, each with two (or occasionally more) possible choices, each choice leading to another question or a taxon. These consistent elements are represented in SDD with the following structure. d230 4 d402 1 a402 1 ---+++2.3.5 Optional elements in SDD dichotomous keys d411 2 a412 1 %META:FILEATTACHMENT{name="identificationkey.jpg" attachment="identificationkey.jpg" attr="" comment="" date="1149740488" path="identificationkey.jpg" size="16701" stream="identificationkey.jpg" user="Main.DonovanSharp" version="1"}% @ 1.3 log @@ text @d1 1 a1 1 %META:TOPICINFO{author="DonovanSharp" date="1149740517" format="1.1" reprev="1.3" version="1.3"}% d195 1 a195 1 Within the SDD structure dichotomous keys are coded with the element < IdentificationKey >, nested within a [[SddDatasets][dataset]] as below. d254 1 a254 1 d273 1 a273 1 d280 1 a280 1 d287 1 a287 1 d294 1 a294 1 @ 1.2 log @@ text @d1 1 a1 1 %META:TOPICINFO{author="DonovanSharp" date="1149228457" format="1.1" reprev="1.2" version="1.2"}% d195 1 a195 1 Within the SDD structure dichotomous keys are coded with the element <IdentificationKey>, nested within a [[SddDatasets][dataset]] as below. d197 1 d406 2 @ 1.1 log @@ text @d1 1 a1 1 %META:TOPICINFO{author="DonovanSharp" date="1149141339" format="1.1" version="1.1"}% d3 1 d5 2 a6 4 SDD Part 0: Introduction and Primer to the SDD Standard 2.3 Dichotomous keys. 2.3.1 Traditional dichotomous keys. d10 1 a10 1 Box 2.3.1 - Typical dichotomous keys d13 114 a126 1 Key to Ascomycete genera a127 10 Ascus unitunicate Clypeus present around ostiolar neck Clypeus poorly developed Glomerella Clypeus well developed Hyllachora Clypeus lacking Ascus widest in middle Physalospora Ascus clavate or cylindrical Glomerella Ascus bitunicate Ascostroma uniloculate Guignardia Ascostroma muliloculate Botryosphaeria d129 61 d192 2 d195 1 a195 7 Key to Australian skinks in the genus Ctenotus 1 Dark upper lateral zone with one or more distinct series of pale spots or blotches along the body 2 1a Dark upper lateral zone obscurely mottled or uniform with at most a few pale spots anteriorly 3 2 Fewer than 25 lamellae under the fourth toe; supralabials 7-8 (usually 7); prefrontals separated C. arcanus 2a More than 25 lamellae under the fourth toe; supralabials 8-9 (usually 8); prefrontals usually in contact C. alleni 3 Pale mid-lateral stripe passes over the hindlimb to continue along the tail C. inornatus 3a Pale mid-lateral stripe extends to groin, then continues along the front edge of the hindlimb C. coggeri a196 4 Key to Aira naturalized in Australia 1. Inflorescence open and spreading 2 Inflorescence dense and spike-like *A. praecox d198 1 a198 9 2. Pedicels 3-8 times spikelet length 3 Pedicels up to 3 times spikelet length 4 3. Spikelets c. 3.5 mm long *A. provincialis Spikelets c. 2 mm long *A. elegantissima 4. Spikelets 2-2.5 mm long *A. cupaniana Spikelets 2.5-3.2 mm long *A. caryophyllea a199 9 2.3.2 SDD representation of dichotomous keys Within the SDD structure dichotomous keys are coded with the element , nested within a as below. Example 2.3.2 - Dichotomous keys within SDD d201 1 a201 1 d224 1 a224 1 d402 1 d229 2 a230 1 2.3.3 Dichotomous keys using statements d233 1 a233 1 A dichotomous key structured with statements consists mostly of the elements and . points to another couplet while points to a taxon name. d235 1 a235 1 Example 2.3.3 - Structure of dichotomous keys within SDD (statements) d238 1 a238 1 d297 1 a297 1 d300 2 a301 1 2.3.4 Dichotomous keys using questions d304 1 a304 1 Example 2.3.4 - Structure of dichotomous keys within SDD (questions) d307 1 a307 1 d394 1 a394 1 d397 2 a398 1 2.3.5 Optional elements in SDD dichotomous keys @