/// <summary>
/// Creates a new WordNode.
/// </summary>
/// <param name="text">The actual text of the word.</param>
/// <param name="tag">The part-of-speech of the word.</param>
/// <param name="confidence">A rating of the confidence of the part-of-speech tagging for this word.</param>
public WordNode(String text, PartOfSpeechTag tag, double confidence) {
if(text == null) { throw new ArgumentNullException("text"); }
this.Text = text;
this.Tag = tag;
this.Confidence = confidence;
if(text == text.ToUpper()) { this.AllCaps = true; }
}
/// <summary>
/// Creates a new WordNode.
/// </summary>
/// <param name="text">The actual text of the word.</param>
/// <param name="tag">The part-of-speech of the word.</param>
/// <param name="confidence">A rating of the confidence of the part-of-speech tagging for this word.</param>
public WordNode(String text, PartOfSpeechTag tag, double confidence)
{
if (text == null)
{
throw new ArgumentNullException("text");
}
this.Text = text;
this.Tag = tag;
this.Confidence = confidence;
if (text == text.ToUpper())
{
this.AllCaps = true;
}
}
private int GetWeightForPartOfSpeech(PartOfSpeechTag pos)
{
const int NormalWeight = 1;
const int PrimaryPosWeight = 5;
const int PreambleWeight = 0;
var primaryPos = new[] { PartOfSpeechTag.Noun, PartOfSpeechTag.NounPlural, PartOfSpeechTag.PastParticiple, PartOfSpeechTag.Verb, PartOfSpeechTag.Verb3PS, PartOfSpeechTag.VerbIng };
int result = NormalWeight;
if (primaryPos.Contains(pos))
{
result = PrimaryPosWeight;
}
else if (pos == PartOfSpeechTag.Preamble)
{
result = PreambleWeight;
}
return(result);
}
/// <summary>
/// Returns a PhraseNode containing the noun phrase words from the given name, starting from startIndex.
/// All noun phrase words prior to the first encountered preposition are included.
/// </summary>
/// <param name="parsedName">The PhraseNode to get the noun phrase from.</param>
/// <param name="startIndex">The index of the word to start from.</param>
private PhraseNode GetNounPhrase(PhraseNode parsedName, int startIndex)
{
PhraseNode phrase = parsedName.GetNewEmpty();
for (int i = startIndex; i < parsedName.Size(); i++)
{
PartOfSpeechTag tag = parsedName[i].Tag;
if (tag == PartOfSpeechTag.Noun ||
tag == PartOfSpeechTag.NounModifier ||
tag == PartOfSpeechTag.Determiner ||
tag == PartOfSpeechTag.Pronoun ||
tag == PartOfSpeechTag.NounIgnorable ||
tag == PartOfSpeechTag.Digit ||
tag == PartOfSpeechTag.Preamble)
{
phrase.Add(parsedName[i]);
}
else if (tag == PartOfSpeechTag.Preposition)
{
break;
}
}
return(phrase);
}
/// <summary>
/// Creates a new WordNode. The confidence is set to the default value of 0.0.
/// </summary>
/// <param name="text">The actual text of the word.</param>
/// <param name="tag">The part-of-speech of the word.</param>
public WordNode(String text, PartOfSpeechTag tag) : this(text, tag, 0.0) { }
/// <summary>
/// Returns a new node of the same type, containing the given text and part-of-speech tag.
/// </summary>
/// <param name="text">The text of the new word.</param>
/// <param name="tag">the part-of-speech tag of the new word.</param>
public virtual WordNode GetNewWord(string text, PartOfSpeechTag tag) {
return new WordNode(text, tag);
}
/// <summary>
/// Creates a new WordNode. The confidence is set to the default value of 0.0.
/// </summary>
/// <param name="text">The actual text of the word.</param>
/// <param name="tag">The part-of-speech of the word.</param>
public WordNode(String text, PartOfSpeechTag tag) : this(text, tag, 0.0)
{
}
/// <summary>
/// Returns a new node of the same type, containing the given text and part-of-speech tag.
/// </summary>
/// <param name="text">The text of the new word.</param>
/// <param name="tag">the part-of-speech tag of the new word.</param>
public virtual WordNode GetNewWord(string text, PartOfSpeechTag tag)
{
return(new WordNode(text, tag));
}
