diff mayachemtools/docs/modules/man3/TopologicalAtomPairsFingerprints.3 @ 0:73ae111cf86f draft

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+.\" ========================================================================
+.\"
+.IX Title "TOPOLOGICALATOMPAIRSFINGERPRINTS 1"
+.TH TOPOLOGICALATOMPAIRSFINGERPRINTS 1 "2015-03-29" "perl v5.14.2" "MayaChemTools"
+.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
+.\" way too many mistakes in technical documents.
+.if n .ad l
+.nh
+.SH "NAME"
+TopologicalAtomPairsFingerprints
+.SH "SYNOPSIS"
+.IX Header "SYNOPSIS"
+use Fingerprints::TopologicalAtomPairsFingerprints;
+.PP
+use Fingerprints::TopologicalAtomPairsFingerprints qw(:all);
+.SH "DESCRIPTION"
+.IX Header "DESCRIPTION"
+\&\fBTopologicalAtomPairsFingerprints\fR  [ Ref 57, Ref 59, Ref 72 ] class provides the following methods:
+.PP
+new, GenerateFingerprints, GetAtomPairIDs, GetDescription, SetAtomIdentifierType,
+SetAtomicInvariantsToUse, SetFunctionalClassesToUse, SetMaxDistance,
+SetMinDistance, StringifyTopologicalAtomPairsFingerprints
+.PP
+\&\fBTopologicalAtomPairsFingerprints\fR is derived from \fBFingerprints\fR class which in turn
+is  derived from \fBObjectProperty\fR base class that provides methods not explicitly defined
+in \fBTopologicalAtomPairsFingerprints\fR, \fBFingerprints\fR or \fBObjectProperty\fR classes using Perl's
+\&\s-1AUTOLOAD\s0 functionality. These methods are generated on-the-fly for a specified object property:
+.PP
+.Vb 3
+\&    Set<PropertyName>(<PropertyValue>);
+\&    $PropertyValue = Get<PropertyName>();
+\&    Delete<PropertyName>();
+.Ve
+.PP
+The current release of MayaChemTools supports generation of \fBAtomTypesFingerpritns\fR
+corresponding to following \fBAtomtomIdentifierTypes\fR:
+.PP
+.Vb 3
+\&    AtomicInvariantsAtomTypes, DREIDINGAtomTypes, EStateAtomTypes,
+\&    FunctionalClassAtomTypes, MMFF94AtomTypes, SLogPAtomTypes,
+\&    SYBYLAtomTypes, TPSAAtomTypes, UFFAtomTypes
+.Ve
+.PP
+Based on the values specified for \fBAtomIdentifierType\fR along with other specified
+parameters such as \fBAtomicInvariantsToUse\fR and \fBFunctionalClassesToUse\fR, initial
+atom types are assigned to all non-hydrogen atoms in a molecule. Using the distance
+matrix for the molecule and initial atom types assigned to non-hydrogen atoms, all unique atom
+pairs within \fBMinDistance\fR and \fBMaxDistance\fR are identified and counted. An atom pair
+identifier is generated for each unique atom pair; the format of atom pair identifier is:
+.PP
+.Vb 1
+\&    <AtomType1>\-D<n>\-<AtomType2>
+\&
+\&    AtomType1, AtomType2: Atom types assigned to atom1 and atom2
+\&    D: Distance between atom1 and atom2
+\&
+\&    where AtomType1 <= AtomType2
+.Ve
+.PP
+The atom pair identifiers for all unique atom pairs corresponding to non-hydrogen atoms constitute
+topological atom pairs fingerprints of the molecule.
+.PP
+The current release of MayaChemTools generates the following types of topological atom pairs
+fingerprints vector strings:
+.PP
+.Vb 6
+\&    FingerprintsVector;TopologicalAtomPairs:AtomicInvariantsAtomTypes:MinD
+\&    istance1:MaxDistance10;223;NumericalValues;IDsAndValuesString;C.X1.BO1
+\&    .H3\-D1\-C.X3.BO3.H1 C.X2.BO2.H2\-D1\-C.X2.BO2.H2 C.X2.BO2.H2\-D1\-C.X3.BO3.
+\&    H1 C.X2.BO2.H2\-D1\-C.X3.BO4 C.X2.BO2.H2\-D1\-N.X3.BO3 C.X2.BO3.H1\-D1\-...;
+\&    2 1 4 1 1 10 8 1 2 6 1 2 2 1 2 1 2 2 1 2 1 5 1 10 12 2 2 1 2 1 9 1 3 1
+\&    1 1 2 2 1 3 6 1 6 14 2 2 2 3 1 3 1 8 2 2 1 3 2 6 1 2 2 5 1 3 1 23 1...
+\&
+\&    FingerprintsVector;TopologicalAtomPairs:AtomicInvariantsAtomTypes:MinD
+\&    istance1:MaxDistance10;223;NumericalValues;IDsAndValuesPairsString;C.X
+\&    1.BO1.H3\-D1\-C.X3.BO3.H1 2 C.X2.BO2.H2\-D1\-C.X2.BO2.H2 1 C.X2.BO2.H2\-D1\-
+\&    C.X3.BO3.H1 4 C.X2.BO2.H2\-D1\-C.X3.BO4 1 C.X2.BO2.H2\-D1\-N.X3.BO3 1 C.X2
+\&    .BO3.H1\-D1\-C.X2.BO3.H1 10 C.X2.BO3.H1\-D1\-C.X3.BO4 8 C.X3.BO3.H1\-D1\-C.X
+\&    3.BO4 1 C.X3.BO3.H1\-D1\-O.X1.BO1.H1 2 C.X3.BO4\-D1\-C.X3.BO4 6 C.X3.BO...
+\&
+\&    FingerprintsVector;TopologicalAtomPairs:DREIDINGAtomTypes:MinDistance1
+\&    :MaxDistance10;157;NumericalValues;IDsAndValuesString;C_2\-D1\-C_3 C_2\-D
+\&    1\-C_R C_2\-D1\-N_3 C_2\-D1\-O_2 C_2\-D1\-O_3 C_3\-D1\-C_3 C_3\-D1\-C_R C_3\-D1\-N_
+\&    R C_3\-D1\-O_3 C_R\-D1\-C_R C_R\-D1\-F_ C_R\-D1\-N_3 C_R\-D1\-N_R C_2\-D2\-C_3 C_2
+\&    1 1 1 2 1 7 1 1 2 23 1 1 2 1 3 5 5 2 1 5 28 2 3 3 1 1 1 2 4 1 1 4 9 3
+\&    1 4 24 2 4 3 3 4 5 5 14 1 1 2 3 22 1 3 4 4 1 1 1 1 2 2 5 1 4 21 3 1...
+\&
+\&    FingerprintsVector;TopologicalAtomPairs:EStateAtomTypes:MinDistance1:M
+\&    axDistance10;251;NumericalValues;IDsAndValuesString;aaCH\-D1\-aaCH aaCH\-
+\&    D1\-aasC aasC\-D1\-aasC aasC\-D1\-aasN aasC\-D1\-dssC aasC\-D1\-sF aasC\-D1\-ssNH
+\&    aasC\-D1\-sssCH aasN\-D1\-ssCH2 dO\-D1\-dssC dssC\-D1\-sOH dssC\-D1\-ssCH2 d...;
+\&    10 8 5 2 1 1 1 1 1 2 1 1 1 2 2 1 4 10 12 2 2 6 3 1 3 2 2 1 1 1 1 1 1 1
+\&    1 1 5 2 1 1 6 12 2 2 2 2 6 1 3 2 2 5 2 2 1 2 1 1 1 1 1 1 3 1 3 19 2...
+\&
+\&    FingerprintsVector;TopologicalAtomPairs:FunctionalClassAtomTypes:MinDi
+\&    stance1:MaxDistance10;144;NumericalValues;IDsAndValuesString;Ar\-D1\-Ar
+\&    Ar\-D1\-Ar.HBA Ar\-D1\-HBD Ar\-D1\-Hal Ar\-D1\-None Ar.HBA\-D1\-None HBA\-D1\-NI H
+\&    BA\-D1\-None HBA.HBD\-D1\-NI HBA.HBD\-D1\-None HBD\-D1\-None NI\-D1\-None No...;
+\&    23 2 1 1 2 1 1 1 1 2 1 1 7 28 3 1 3 2 8 2 1 1 1 5 1 5 24 3 3 4 2 13 4
+\&    1 1 4 1 5 22 4 4 3 1 19 1 1 1 1 1 2 2 3 1 1 8 25 4 5 2 3 1 26 1 4 1 ...
+\&
+\&    FingerprintsVector;TopologicalAtomPairs:MMFF94AtomTypes:MinDistance1:M
+\&    axDistance10;227;NumericalValues;IDsAndValuesPairsString;C5A\-D1\-C5B 2 
+\&    C5A\-D1\-CB 1 C5A\-D1\-CR 1 C5A\-D1\-N5 2 C5B\-D1\-C5B 1 C5B\-D1\-C=ON 1 C5B\-D1\-
+\&    CB 1 C=ON\-D1\-NC=O 1 C=ON\-D1\-O=CN 1 CB\-D1\-CB 18 CB\-D1\-F 1 CB\-D1\-NC=O 1
+\&    COO\-D1\-CR 1 COO\-D1\-O=CO 1 COO\-D1\-OC=O 1 CR\-D1\-CR 7 CR\-D1\-N5 1 CR\-D1\-OR
+\&    2 C5A\-D2\-C5A 1 C5A\-D2\-C5B 2 C5A\-D2\-C=ON 1 C5A\-D2\-CB 3 C5A\-D2\-CR 4 ...
+\&
+\&    FingerprintsVector;TopologicalAtomPairs:SLogPAtomTypes:MinDistance1:Ma
+\&    xDistance10;329;NumericalValues;IDsAndValuesPairsString;C1\-D1\-C10 1 C1
+\&    \-D1\-C11 2 C1\-D1\-C5 1 C1\-D1\-CS 4 C10\-D1\-N11 1 C11\-D1\-C21 1 C14\-D1\-C18 2
+\&    C14\-D1\-F 1 C18\-D1\-C18 10 C18\-D1\-C20 4 C18\-D1\-C22 2 C20\-D1\-C20 3 C20\-D
+\&    1\-C21 1 C20\-D1\-N11 1 C21\-D1\-C21 1 C21\-D1\-C5 1 C21\-D1\-N11 1 C22\-D1\-N4 1
+\&    C5\-D1\-N4 1 C5\-D1\-O10 1 C5\-D1\-O2 1 C5\-D1\-O9 1 CS\-D1\-O2 2 C1\-D2\-C1 3...
+\&
+\&    FingerprintsVector;TopologicalAtomPairs:SYBYLAtomTypes:MinDistance1:Ma
+\&    xDistance10;159;NumericalValues;IDsAndValuesPairsString;C.2\-D1\-C.3 1 C
+\&    .2\-D1\-C.ar 1 C.2\-D1\-N.am 1 C.2\-D1\-O.2 1 C.2\-D1\-O.co2 2 C.3\-D1\-C.3 7 C.
+\&    3\-D1\-C.ar 1 C.3\-D1\-N.ar 1 C.3\-D1\-O.3 2 C.ar\-D1\-C.ar 23 C.ar\-D1\-F 1 C.a
+\&    r\-D1\-N.am 1 C.ar\-D1\-N.ar 2 C.2\-D2\-C.3 1 C.2\-D2\-C.ar 3 C.3\-D2\-C.3 5 C.3
+\&    \-D2\-C.ar 5 C.3\-D2\-N.ar 2 C.3\-D2\-O.3 4 C.3\-D2\-O.co2 2 C.ar\-D2\-C.ar 2...
+\&
+\&    FingerprintsVector;TopologicalAtomPairs:TPSAAtomTypes:MinDistance1:Max
+\&    Distance10;64;NumericalValues;IDsAndValuesPairsString;N21\-D1\-None 3 N7
+\&    \-D1\-None 2 None\-D1\-None 34 None\-D1\-O3 2 None\-D1\-O4 3 N21\-D2\-None 5 N7\-
+\&    D2\-None 3 N7\-D2\-O3 1 None\-D2\-None 44 None\-D2\-O3 2 None\-D2\-O4 5 O3\-D2\-O
+\&    4 1 N21\-D3\-None 7 N7\-D3\-None 4 None\-D3\-None 45 None\-D3\-O3 4 None\-D3\-O4
+\&    5 N21\-D4\-N7 1 N21\-D4\-None 5 N21\-D4\-O3 1 N21\-D4\-O4 1 N7\-D4\-None 4 N...
+\&
+\&    FingerprintsVector;TopologicalAtomPairs:UFFAtomTypes:MinDistance1:MaxD
+\&    istance10;157;NumericalValues;IDsAndValuesPairsString;C_2\-D1\-C_3 1 C_2
+\&    \-D1\-C_R 1 C_2\-D1\-N_3 1 C_2\-D1\-O_2 2 C_2\-D1\-O_3 1 C_3\-D1\-C_3 7 C_3\-D1\-C
+\&    _R 1 C_3\-D1\-N_R 1 C_3\-D1\-O_3 2 C_R\-D1\-C_R 23 C_R\-D1\-F_ 1 C_R\-D1\-N_3 1 
+\&    C_R\-D1\-N_R 2 C_2\-D2\-C_3 1 C_2\-D2\-C_R 3 C_3\-D2\-C_3 5 C_3\-D2\-C_R 5 C_3\-D
+\&    2\-N_R 2 C_3\-D2\-O_2 1 C_3\-D2\-O_3 5 C_R\-D2\-C_R 28 C_R\-D2\-F_ 2 C_R\-D2\-...
+.Ve
+.SS "\s-1METHODS\s0"
+.IX Subsection "METHODS"
+.IP "\fBnew\fR" 4
+.IX Item "new"
+.Vb 2
+\&    $NewTopologicalAtomPairsFingerprints = new TopologicalAtomPairsFingerprints(
+\&                                                   %NamesAndValues);
+.Ve
+.Sp
+Using specified \fITopologicalAtomPairsFingerprints\fR property names and values hash, \fBnew\fR
+method creates a new object and returns a reference to newly created \fBTopologicalAtomPairsFingerprints\fR
+object. By default, the following properties are initialized:
+.Sp
+.Vb 7
+\&    Molecule = \*(Aq\*(Aq
+\&    Type = \*(AqTopologicalAtomPairs\*(Aq
+\&    MinDistance = 1
+\&    MaxDistance = 10
+\&    AtomIdentifierType = \*(Aq\*(Aq
+\&    AtomicInvariantsToUse = [\*(AqAS\*(Aq, \*(AqX\*(Aq, \*(AqBO\*(Aq, \*(AqH\*(Aq, \*(AqFC\*(Aq]
+\&    FunctionalClassesToUse = [\*(AqHBD\*(Aq, \*(AqHBA\*(Aq, \*(AqPI\*(Aq, \*(AqNI\*(Aq, \*(AqAr\*(Aq, \*(AqHal\*(Aq]
+.Ve
+.Sp
+Examples:
+.Sp
+.Vb 4
+\&    $TopologicalAtomPairsFingerprints = new TopologicalAtomPairsFingerprints(
+\&                              \*(AqMolecule\*(Aq => $Molecule,
+\&                              \*(AqAtomIdentifierType\*(Aq =>
+\&                                              \*(AqAtomicInvariantsAtomTypes\*(Aq);
+\&
+\&    $TopologicalAtomPairsFingerprints = new TopologicalAtomPairsFingerprints(
+\&                              \*(AqMolecule\*(Aq => $Molecule,
+\&                              \*(AqMinDistance\*(Aq => 1,
+\&                              \*(AqMaxDistance\*(Aq => 10,
+\&                              \*(AqAtomIdentifierType\*(Aq =>
+\&                                              \*(AqAtomicInvariantsAtomTypes\*(Aq,
+\&                              \*(AqAtomicInvariantsToUse\*(Aq =>
+\&                                              [\*(AqAS\*(Aq, \*(AqX\*(Aq, \*(AqBO\*(Aq, \*(AqH\*(Aq, \*(AqFC\*(Aq] );
+\&
+\&    $TopologicalAtomPairsFingerprints = new TopologicalAtomPairsFingerprints(
+\&                              \*(AqMolecule\*(Aq => $Molecule,
+\&                              \*(AqAtomIdentifierType\*(Aq =>
+\&                                              \*(AqEStateAtomTypes\*(Aq);
+\&
+\&    $TopologicalAtomPairsFingerprints = new TopologicalAtomPairsFingerprints(
+\&                              \*(AqMolecule\*(Aq => $Molecule,
+\&                              \*(AqAtomIdentifierType\*(Aq =>
+\&                                              \*(AqSLogPAtomTypes\*(Aq);
+\&
+\&    $TopologicalAtomPairsFingerprints = new TopologicalAtomPairsFingerprints(
+\&                              \*(AqMolecule\*(Aq => $Molecule,
+\&                              \*(AqMinDistance\*(Aq => 1,
+\&                              \*(AqMaxDistance\*(Aq => 10,
+\&                              \*(AqAtomIdentifierType\*(Aq =>
+\&                                              \*(AqFunctionalClassAtomTypes\*(Aq,
+\&                              \*(AqFunctionalClassesToUse\*(Aq =>
+\&                                              [\*(AqHBD\*(Aq, \*(AqHBA\*(Aq, \*(AqPI\*(Aq, \*(AqNI\*(Aq, \*(AqAr\*(Aq, \*(AqHal\*(Aq]);
+\&
+\&
+\&    $TopologicalAtomPairsFingerprints\->GenerateFingerprints();
+\&    print "$TopologicalAtomPairsFingerprints\en";
+.Ve
+.IP "\fBGetDescription\fR" 4
+.IX Item "GetDescription"
+.Vb 1
+\&    $Description = $TopologicalAtomPairsFingerprints\->GetDescription();
+.Ve
+.Sp
+Returns a string containing description of topological atom pairs fingerprints fingerprints.
+.IP "\fBGenerateFingerprints\fR" 4
+.IX Item "GenerateFingerprints"
+.Vb 1
+\&    $TopologicalAtomPairsFingerprints\->GenerateFingerprints();
+.Ve
+.Sp
+Generates topological atom pairs fingerprints and returns \fITopologicalAtomPairsFingerprints\fR.
+.IP "\fBGetAtomPairIDs\fR" 4
+.IX Item "GetAtomPairIDs"
+.Vb 2
+\&    $AtomPairIDsRef = $TopologicalAtomPairsFingerprints\->GetAtomPairIDs();
+\&    @AtomPairIDs = $TopologicalAtomPairsFingerprints\->GetAtomPairIDs();
+.Ve
+.Sp
+Returns atom pair IDs corresponding to atom pairs count values in topological atom pairs
+fingerprints vector as an array or reference to an array.
+.IP "\fBSetAtomIdentifierType\fR" 4
+.IX Item "SetAtomIdentifierType"
+.Vb 1
+\&    $TopologicalAtomPairsFingerprints\->SetAtomIdentifierType($IdentifierType);
+.Ve
+.Sp
+Sets atom \fIIdentifierType\fR to use during atom pairs fingerprints generation and
+returns \fITopologicalAtomPairsFingerprints\fR.
+.Sp
+Possible values: \fIAtomicInvariantsAtomTypes, DREIDINGAtomTypes, EStateAtomTypes,
+FunctionalClassAtomTypes, MMFF94AtomTypes, SLogPAtomTypes, SYBYLAtomTypes,
+TPSAAtomTypes, UFFAtomTypes\fR.
+.IP "\fBSetAtomicInvariantsToUse\fR" 4
+.IX Item "SetAtomicInvariantsToUse"
+.Vb 2
+\&    $TopologicalAtomPairsFingerprints\->SetAtomicInvariantsToUse($ValuesRef);
+\&    $TopologicalAtomPairsFingerprints\->SetAtomicInvariantsToUse(@Values);
+.Ve
+.Sp
+Sets atomic invariants to use during \fIAtomicInvariantsAtomTypes\fR value of \fIAtomIdentifierType\fR
+for topological atom pairs fingerprints generation and returns \fITopologicalAtomPairsFingerprints\fR.
+.Sp
+Possible values for atomic invariants are: \fI\s-1AS\s0, X, \s-1BO\s0,  \s-1LBO\s0, \s-1SB\s0, \s-1DB\s0, \s-1TB\s0,
+H, Ar, \s-1RA\s0, \s-1FC\s0, \s-1MN\s0, \s-1SM\s0\fR. Default value: \fI\s-1AS\s0,X,BO,H,FC\fR.
+.Sp
+The atomic invariants abbreviations correspond to:
+.Sp
+.Vb 1
+\&    AS = Atom symbol corresponding to element symbol
+\&
+\&    X<n>   = Number of non\-hydrogen atom neighbors or heavy atoms
+\&    BO<n> = Sum of bond orders to non\-hydrogen atom neighbors or heavy atoms
+\&    LBO<n> = Largest bond order of non\-hydrogen atom neighbors or heavy atoms
+\&    SB<n> = Number of single bonds to non\-hydrogen atom neighbors or heavy atoms
+\&    DB<n> = Number of double bonds to non\-hydrogen atom neighbors or heavy atoms
+\&    TB<n> = Number of triple bonds to non\-hydrogen atom neighbors or heavy atoms
+\&    H<n>   = Number of implicit and explicit hydrogens for atom
+\&    Ar     = Aromatic annotation indicating whether atom is aromatic
+\&    RA     = Ring atom annotation indicating whether atom is a ring
+\&    FC<+n/\-n> = Formal charge assigned to atom
+\&    MN<n> = Mass number indicating isotope other than most abundant isotope
+\&    SM<n> = Spin multiplicity of atom. Possible values: 1 (singlet), 2 (doublet) or
+\&            3 (triplet)
+.Ve
+.Sp
+Atom type generated by AtomTypes::AtomicInvariantsAtomTypes class corresponds to:
+.Sp
+.Vb 1
+\&    AS.X<n>.BO<n>.LBO<n>.<SB><n>.<DB><n>.<TB><n>.H<n>.Ar.RA.FC<+n/\-n>.MN<n>.SM<n>
+.Ve
+.Sp
+Except for \s-1AS\s0 which is a required atomic invariant in atom types, all other atomic invariants are
+optional. Atom type specification doesn't include atomic invariants with zero or undefined values.
+.Sp
+In addition to usage of abbreviations for specifying atomic invariants, the following descriptive words
+are also allowed:
+.Sp
+.Vb 12
+\&    X : NumOfNonHydrogenAtomNeighbors or NumOfHeavyAtomNeighbors
+\&    BO : SumOfBondOrdersToNonHydrogenAtoms or SumOfBondOrdersToHeavyAtoms
+\&    LBO : LargestBondOrderToNonHydrogenAtoms or LargestBondOrderToHeavyAtoms
+\&    SB :  NumOfSingleBondsToNonHydrogenAtoms or NumOfSingleBondsToHeavyAtoms
+\&    DB : NumOfDoubleBondsToNonHydrogenAtoms or NumOfDoubleBondsToHeavyAtoms
+\&    TB : NumOfTripleBondsToNonHydrogenAtoms or NumOfTripleBondsToHeavyAtoms
+\&    H :  NumOfImplicitAndExplicitHydrogens
+\&    Ar : Aromatic
+\&    RA : RingAtom
+\&    FC : FormalCharge
+\&    MN : MassNumber
+\&    SM : SpinMultiplicity
+.Ve
+.Sp
+\&\fIAtomTypes::AtomicInvariantsAtomTypes\fR module is used to assign atomic invariant
+atom types.
+.IP "\fBSetFunctionalClassesToUse\fR" 4
+.IX Item "SetFunctionalClassesToUse"
+.Vb 2
+\&    $TopologicalAtomPairsFingerprints\->SetFunctionalClassesToUse($ValuesRef);
+\&    $TopologicalAtomPairsFingerprints\->SetFunctionalClassesToUse(@Values);
+.Ve
+.Sp
+Sets functional classes invariants to use during \fIFunctionalClassAtomTypes\fR value of \fIAtomIdentifierType\fR
+for topological atom pairs fingerprints generation and returns \fITopologicalAtomPairsFingerprints\fR.
+.Sp
+Possible values for atom functional classes are: \fIAr, \s-1CA\s0, H, \s-1HBA\s0, \s-1HBD\s0, Hal, \s-1NI\s0, \s-1PI\s0, \s-1RA\s0\fR.
+Default value [ Ref 24 ]: \fI\s-1HBD\s0,HBA,PI,NI,Ar,Hal\fR.
+.Sp
+The functional class abbreviations correspond to:
+.Sp
+.Vb 9
+\&    HBD: HydrogenBondDonor
+\&    HBA: HydrogenBondAcceptor
+\&    PI :  PositivelyIonizable
+\&    NI : NegativelyIonizable
+\&    Ar : Aromatic
+\&    Hal : Halogen
+\&    H : Hydrophobic
+\&    RA : RingAtom
+\&    CA : ChainAtom
+\&
+\& Functional class atom type specification for an atom corresponds to:
+\&
+\&    Ar.CA.H.HBA.HBD.Hal.NI.PI.RA or None
+.Ve
+.Sp
+\&\fIAtomTypes::FunctionalClassAtomTypes\fR module is used to assign functional class atom
+types. It uses following definitions [ Ref 60\-61, Ref 65\-66 ]:
+.Sp
+.Vb 4
+\&    HydrogenBondDonor: NH, NH2, OH
+\&    HydrogenBondAcceptor: N[!H], O
+\&    PositivelyIonizable: +, NH2
+\&    NegativelyIonizable: \-, C(=O)OH, S(=O)OH, P(=O)OH
+.Ve
+.IP "\fBSetMaxDistance\fR" 4
+.IX Item "SetMaxDistance"
+.Vb 1
+\&    $TopologicalAtomPairsFingerprints\->SetMaxDistance($Distance);
+.Ve
+.Sp
+Sets maximum distance to use during topological atom pairs fingerprints generation and
+returns \fITopologicalAtomPairsFingerprints\fR.
+.IP "\fBSetMinDistance\fR" 4
+.IX Item "SetMinDistance"
+.Vb 1
+\&    $TopologicalAtomPairsFingerprints\->SetMinDistance($Distance);
+.Ve
+.Sp
+Sets minimum distance to use during topological atom pairs fingerprints generation and
+returns \fITopologicalAtomPairsFingerprints\fR.
+.IP "\fBStringifyTopologicalAtomPairsFingerprints\fR" 4
+.IX Item "StringifyTopologicalAtomPairsFingerprints"
+.Vb 2
+\&    $String = $TopologicalAtomPairsFingerprints\->
+\&                  StringifyTopologicalAtomPairsFingerprints();
+.Ve
+.Sp
+Returns a string containing information about \fITopologicalAtomPairsFingerprints\fR object.
+.SH "AUTHOR"
+.IX Header "AUTHOR"
+Manish Sud <msud@san.rr.com>
+.SH "SEE ALSO"
+.IX Header "SEE ALSO"
+Fingerprints.pm, FingerprintsStringUtil.pm, AtomNeighborhoodsFingerprints.pm,
+AtomTypesFingerprints.pm, EStateIndiciesFingerprints.pm, ExtendedConnectivityFingerprints.pm,
+MACCSKeys.pm, PathLengthFingerprints.pm, TopologicalAtomTripletsFingerprints.pm,
+TopologicalAtomTorsionsFingerprints.pm, TopologicalPharmacophoreAtomPairsFingerprints.pm,
+TopologicalPharmacophoreAtomTripletsFingerprints.pm
+.SH "COPYRIGHT"
+.IX Header "COPYRIGHT"
+Copyright (C) 2015 Manish Sud. All rights reserved.
+.PP
+This file is part of MayaChemTools.
+.PP
+MayaChemTools is free software; you can redistribute it and/or modify it under
+the terms of the \s-1GNU\s0 Lesser General Public License as published by the Free
+Software Foundation; either version 3 of the License, or (at your option)
+any later version.