Skill Domain Expansion

How Skill Domain Expansion Works

When skillDomainExpansion is set to true, the system identifies the domains associated with the skills available in the Resume or Job Description and uses the related ontology information during matching.

For example, consider a Job Description that contains the skill Python. In the Taxonomy dataset, Python can be associated with multiple domains, such as Software Development, Data Science, and Artificial Intelligence/Machine Learning.

When Skill Domain Expansion is enabled, the system considers these multiple domain associations instead of treating Python as a skill from only one domain. With ontologyBasedSearch enabled, the system can also consider related skills and aliases available within those ontology relationships, such as Django, Pandas, TensorFlow, Keras, or PyTorch, depending on the relationships available in the Taxonomy dataset.

As a result, a candidate who may not have exactly the same skill combination as the Job Description can still be identified as relevant when their skills belong to the related domains and ontology relationships. This helps improve the contextual accuracy of skill matching.

Skill Domain Expansion can be applied to the following match types:

• JD to Resume

• Resume to JD

• JD to JD

• Resume to Resume

Prerequisite

Ontology Based Search must be enabled to use Skill Domain Expansion.

"ontologyBasedSearch": true,
"skillDomainExpansion": true

The skillDomainExpansion functionality works only when ontologyBasedSearch is set to true.

Usage

To enable Skill Domain Expansion, set the skillDomainExpansion parameter to true.

"skillDomainExpansion": true

The parameter accepts the following Boolean values:

• true — Enables skill domain expansion.

• false — Disables skill domain expansion.

When the feature is disabled, the existing matching behavior is used without skill domain expansion.

Supported APIs

Skill Domain Expansion is supported with the following Match APIs:

• Match
• Match with ID
• Match with Multiple Sub-User Ids
• One To One Match

Compatible Features

Skill Domain Expansion can be used with the following Search and Match features:

• Match using Indexed IDs

• Match Ontology Skills

• Skill Ranking

• Skill Group Match

Sample Request

{
    "index": {
        "indexKey": "Use your indexKey",
        "subUserId": "Use your subUserId"
    },
    "match": {
        "resumeContent": "Base64 resume content",
        "resumeFileName": "resume.docx",
        "jdContent": "Base64 JD content",
        "jdFileName": "jd.docx"
    },
    "skillDomainExpansion": true,
    "ontologyBasedSearch": true,
    "matchType": "JD To Resume",
    "pageSize": 5,
    "pageStart": 0,
    "explainScore": true,
    "explainScoreType": "json"
}

You can set explainScore to true to review the entities and skills that contribute to the matching score.

Sample Response

{
    "count": 1,
    "pageStart": 0,
    "pageSize": 5,
    "records": [
        {
            "id": "resume-001",
            "score": 74.98,
            "FullName": "Rahul Sharma",
            "CurrentJobProfile": "Data Analyst",
            "TotalExperienceInYear": 3
        }
    ],
    "explainScore": [
        {
            "id": "resume-001",
            "explaination": {
                "score": 74.98,
                "maxScore": 100.0,
                "Match": {
                    "score": 74.98,
                    "maxScore": 100.0,
                    "detailScore": [
                        {
                            "entity": "CurrentJobProfile",
                            "score": 43.75,
                            "maxScore": 43.75,
                            "value": "Data Analyst OR Data Engineer OR Machine Learning Specialist OR Business Intelligence Analyst OR Data Scientist"
                        },
                        {
                            "entity": "TotalExperienceInYear",
                            "score": 12.5,
                            "maxScore": 12.5,
                            "value": "[3.0 TO Infinity]"
                        },
                        {
                            "entity": "SkillHaveExp",
                            "score": 1.91,
                            "maxScore": 1.91,
                            "value": "Machine Learning OR Predictive Modeling OR Data Analysis"
                        },
                        {
                            "entity": "SkillAlias",
                            "score": 1.53,
                            "maxScore": 1.91,
                            "value": "TensorFlow OR Keras OR PyTorch OR Neural Networks OR Deep Learning"
                        },
                        {
                            "entity": "SkillHaveExp",
                            "score": 1.75,
                            "maxScore": 1.75,
                            "value": "SQL OR Database Management OR Data Modeling OR Azure Data Factory"
                        }
                    ]
                }
            }
        }
    ]
}

Error Handling

The skillDomainExpansion parameter accepts only Boolean values.

If an invalid value is provided, the API returns the following error:

Error Code: 2191

Message: skillDomainExpansion type must have value either true or false.

Important Considerations

Skill Domain Expansion depends on the domain and ontology relationships available in the Taxonomy dataset.

Enabling the feature can change the matching results because additional relevant domain associations and ontology relationships are considered during matching.